Solving Proportion Problems

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

• $7.20

• $6.40

• $10.00

• $9.60

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

• 6

• 12

• 3

• 8

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

• 175

• 185

• 200

• 220

Lee can type 432 words in 6 minutes. How many words can he type in 1 minute?

If y is directly proportional to x, and y = 10 when x = 2, what is the value of y when x = 5?

• 15

• 20

• 25

• 30

Complete the table to show a proportional relationship between x and y, where the constant of proportionality is 3. | x | y | |---|----| | 1 | 3 | | 2 | 6 | | 4 | ? | | 5 | 15 |

• 9

• 12

• 18

• 21

• A
• B
• C
• D

The ratio of black keys to white keys on a piano is 5 to 7.  Complete the table to create additional equivalent ratios.​

d

c

e

f

35

84

55

63

28

21

Which of the following scenarios describes a proportional relationship?

• The number of pages a printer prints per minute.

• The temperature in degrees Fahrenheit as the day progresses.

• The cost of apples per pound at a grocery store.

• The height of a plant as it grows irregularly over time.

• A
• B
• C
• D