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Name: Date:Cross Multiplying to Find an UnknownPRO 1Instructions: For each of these proportions (without units), use the cross-multiplying procedureyou learned in the video to solve for the unknown number ‘n’.13n2 932n 3 9 2n 3 18 335 8 n 2n 6n 20n12 4640 n 2224n 6 4 1290 9 n99n 83n 832n 1063 32 8 n7 n 6377n 12735 3n721 3n7 n 3 2196 8 n8872n 9452 45 9 nn 6 4866552 n8n 98n5 6307 n 3 35n 30 6 57 n 10577n 30 303030n 15Proportions mathantics.comn 1 2014 Math Plus Motion, LLC

Name: Date:Cross Multiplying to Find an Unknown - Set 2PRO 2Instructions: For each of these proportions (without units), use the cross-multiplying procedureyou learned in the video to solve for the unknown number ‘n’. You can use a calculator for this set.1n2 752n 5 7 2n 5 14 558 6 n 1548 n 151515n 3.2n 2.83n3 5104n 10 5 342 12 n1212n 1.53n 532n 3.563 32 5 n4 n 15344n 19.251.2 7n451 3n4 n 3 5196 5 n5577n 1267 6 12 nn 10 1510105815 n6n 38.258n3 102.55 n 7 1.2n 2.5 10 35 n 8.455n 2.5 302.52.5n 1.68n 12Proportions mathantics.com 2014 Math Plus Motion, LLC

Name: Date:Proportion Word ProblemsPRO 3Instructions: Use proportions to answer each of these word problems. You can use a calculator.1If 2 liters of sea water contain 70grams of salt, how much salt is in 32liters of sea water?70 gramsn 2 liters322930 kg3 daysgramsliters70 32 2 n210 mi4 gal n124daysIf a farmer gets 340 bushels of cornfrom 2 acres of land, how many bushelscan they get from 15 acres?152 acres n340 bushelsmigalacresbushels2 n 340 152,520 4 n442 n 5,10022n 2,550 bushelsn 630 miA factory can make 20 toasters in ahalf-hour (0.5 hrs) How many toasterscan the factory make in 6.5 hours?n20 toasters 6.50.5 hourskgn 2,170 kg210 12 4 n5n76,510 3 n33n 1,120 gramsIf a fuel efficient car can go 210 mileson 4 gallons of fuel, how far can it goon 12 gallons? 930 7 3 n2,240 2 n223If it takes 930 kg of food to feed a pairof elephants for 3 days, how much foodwould you need to feed them for a week?toastershours20 6.5 0.5 n130 0.5 n0.50.5n 260 toastersProportions mathantics.com6On a scaled drawing, a building measures4.5 cm tall. If the scale of the drawing is25 meters per 2 cm, how tall is the actualbuilding?2 cm25 m 4.5ncmm2 n 25 4.52 n 112.522n 56.25 m 2014 Math Plus Motion, LLC

Name: Date:Proportion Word Problems - Set 2PRO 4Instructions: Use proportions to answer each of these word problems. You can use a calculator.1A rain gauge collected 0.2 inches ofrain in 30 minutes. If it keeps rainingat the same rate, what’s the total timeit will take to collect 1 inch of rain?0.2 in30 min 1n2n squirrels15 squirrels 3 acres275 acresinmin0.2 n 30 115 275 3 n0.2 n 300.20.24,125 3 n33n 1,375 squirrelsn 150 min3A runner burned 120 calories on a 1.6km run. How many calories wouldthey burn on a 5 km run?1.6 km120 cal5A biologist counted 15 squirrels in 3 acresof forest. Based on that data, how manysquirrels would be expected to inhabit a275 acre forest? 5n4If 3 oranges cost 1.75, how muchwould 20 oranges cost?3 oranges 20 oranges n dollars1.75 dollarskmcal1.6 n 120 53 n 1.75 201.6 n 6001.61.63 n 3533n 375 caln 11.67If it takes 2.3 gallons of milk to make 2pounds of cheese, how many poundsof cheese can you make with 50 gallonsof milk?2.3 gal2 lbs 50ngallbs2.3 n 2 502.3 n 1002.32.3n 43.5 lbsProportions mathantics.com6If you need 8 oz of chocolate chips tomake 1.6 lbs of cookie dough, how manyounces of chocolate chips will you need tomake 7 pounds of cookie dough?8 oz1.6 lbs n7ozlbs8 7 1.6 n56 1.6 n1.61.6n 35 oz 2014 Math Plus Motion, LLC

Name: Date:Scaled Drawing Problems - page 1PRO 5Instructions: Use this map to answer the questions below and on the following page.note: all measurements are approximate, printout may not be to scale1How many miles is it from Honoluluto Diamond Head?410cmmi 2ncmmi2How many miles is it from Honoluluto Pearl Harbor?410cmmi 2.8ncmmi4 n 10 24 n 10 2.84 n 20444 n 2844n 5 milesProportions mathantics.comn 7 miles 2014 Math Plus Motion, LLC

Name: Date:Scaled Drawing Problems - page 2PRO 6Instructions: Use the map on the previous page to answer these questions.see previous page3How many miles is it from Honoluluto Turtle Bay?410cmmi 411.2 cmn miHow many miles is it from Turtle Bayto Waialua Bay?4104.4ncmmi4 n 10 4.44 n 112444 n 4444How many miles is it from Pearl Harborto Ka’Ena Point?410cmmi 10nn 11 miles6How many miles is it from Honoluluto Kaneohe?410cmmicmmi 3.2ncmmi4 n 10 104 n 10 3.24 n 100444 n 3244n 25 miles7mi 4 n 10 11.2n 28 miles5cmHow many miles is it from Kaneoheto Hanauma Bay?410cmmi 4.8ncmmin 8 miles8How many miles is it from Ka’EnaPoint to Waialua Bay?410cmmi 4ncmmi4 n 10 4.84 n 10 44 n 48444 n 4044n 12 milesProportions mathantics.comn 10 miles 2014 Math Plus Motion, LLC

4 n 10 2.8. 4 n 28 n 7 miles. 4 4. cm cm. mi mi. 2.8 n. 4 10 2014 ath lus otion, Date ame Prop