Find Unknowns Using Proportions

Two ratios that are equal are

• similar sides
• unit rates
• congruent
• proportional

Solve the proportion.

• k=5
• k=3.3333333
• k=60
• k=90

Solve the proportion.

• p=31.3
• p=308
• p=924
• p=532

Solve the equation for x:

• 17
• 16
• 15
• 14

Solve the proportion:

• 4
• 21
• 24
• 3

Solve the proportion:

• 15
• 5
• 10
• 12

• 2.5
• 1
• 3.25
• -2.25

Cross Multiply/Cross Products

• 15
• 420
• 28
• 16

There were 5 ice cream cones for every 3 brownies sold at the ice cream shop. If there were 24 brownies sold, how many ice cream cones were sold?

• 8
• 15
• 40
• 29

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