Solving Problems with Proportions

Emily enlarged the size of a painting to a width of 15 in. What is the new height if it was originally 3 in. wide and 4 in. tall?

• 17 in.

• 20 in.

• 5 in.

• 23 in.

20 Fuji apples cost $12. How many Fuji apples can you buy for $3?

• 8

• 7

• 5

• 1

If you can buy four bunches of seedless black grapes for $10, then how many can you buy with $5?

• 3

• 1

• 2

• 13

Fairview and Rockville are 104 km from each other. How far apart would the cities be on a map that has a scale of 1 cm : 13 km?

• 7 cm 

• 1352 cm 

• 8 cm 

• 4 cm 

• A
• B
• C
• D

• A
• B
• C
• D

The ratio of the measures of the sides of a triangle is 21:8:14. If the perimeter of the triangle is 215 feet, find the length of each side.

• 105 ft

• x =

• 70 ft

• 8 corresponds to

• 40 ft

• 14 corresponds to

• 5

• 21 corresponds

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

21

28

55

63

35

84

A model giraffe has a scale of 1 in : 3 ft. If the model giraffe is 5 in tall, then how tall is the real giraffe?

• 15 ft 

• 1 ft

• 2 ft 

• 8 ft 

An adult elephant that is 8 ft tall casts a shadow that is 4 ft long. Find the height of a statue that casts a 9 ft shadow.

• 36 ft 

• 2 ft 

• 16 ft 

• 18 ft