Solving Proportions and Scale

Solve for x 

• x = 16

• x = 28

• x = 1/26

• x = 26

A scale drawing of a billboard uses the scale 4 cm:9 ft. The length of the billboard in the drawing is 11 cm. How long is the actual billboard?

• 13 ft

• 20.75 ft

• 24.75 ft

• 22 ft

It takes Mike 18 minutes to finish reading 4 pages of a book.  If Mike reads each page at the same pace, how long does it take for him to finish reading 30 pages?

• 125 minutes

• 162 minutes

• 72 minutes

• 135 minutes

Solve for x 

• x = 1/10

• x = 10

• x = 4

• x = 5

A scale model of the Golden Gate Bridge in San Francisco Bay is built with a scale of 1 foot : 525 feet. If the main span of the bridge is 4, 200 feet long, what is the length of the main span in the model?

• 10 feet

• 3 feet

• 6 feet

• 8 feet

The scale of a map says that 6 cm represents 15 km.

What distance on the map represents an actual distance of 6 kilometers?

• 3.6

• 2.5

• 2.4

• .42

The height of a telephone pole on a map is 6 cm. The scale is 2cm:20m. What is the actual height of the telephone pole?

• 6 m

• 10 m

• 18 m

• 60 m

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

28

21

55

84

63

A model airplane is made to the scale 1 inch to 24 inches. If the wing of the actual plane is 18 feet long, how long will the model wing be in inches?

A drawing of the Greensburg Airport uses a scale of 1 centimeter = 300 meters. A runway is drawn 12 centimeters long. How many meters is the actual length of the runway?

• 3,600 meters

• 25 meters

• 12 meters

• 144 meters