Solving Word Problem Using Proportion

How can we identify the unknown in a proportion? (Check all the right answers)

• using a variable, like x or y

• putting a box in the place of the unknown

• putting a question mark in place of the unknown

• putting the number 10 to hold the place

Solve the proportion: If there are 10 students in one class, there would be _________ students in 5 classes.

• 5

• 50

• 10

• 55

Solve the proportion, a car that drives 100km / hour, will travel _________ km in 3 hours.

• 3

• 100

• 150

• 300

Allison can bake 4 cakes in one day.  How many days would it take to bake 24 cakes? Which of the following proportions can be used to solve this problem?

If 65% of the people in the city have lost work this year, how many people out of 500 have lost work?

• 65

• 435

• 325

• 565

6 pencils costs 36 cents. How much do 2 pencils cost?

• 6

• 12

• 3

• 8

Sam rakes 3 bags of leaves in 16 minutes. If he keeps working how long will it take him to rake 5 bags of leaves?

• 9.6

• 26.6

• 15

• 80

On a map, if one centimeter represents 25 kilometers, how many kilometers does 7 centimeters represent?

• 175

• 185

• 200

• 220

If four ice creams cost $3.20, what would 8 ice cream cost?

• $7.20

• $6.40

• $10.00

• $9.60

At Bestway one pound of chicken costs $4.45. If Mary buy 3 pounds, how much will it cost?

• $7.45

• $13.35

• $8.75

• $1.73