Proportions Review

Two quantities are proportional if their ____ are equal

• numerators

• denominators

• cross products

• units

Determine whether the ratios form a proportion:

• Proportional

• Not Proportional

Which ratio is proportional to 18/27?

• 1/9

• 12/18

• 21/30

• 90/220

Determine whether the ratios form a proportion:

• Proportional

• Not Proportional

What is the cross product of the proportion?

• 14

• 12

• 126

• 42

Select all ratios proportional to 10:35

• 4:14

• 5/30

• 1:3

• 2/7

• 100 to 350

Are x and y proportional?

• Yes

• No

Do these ratios form a proportion?

If YES please also select the cross product.

• Yes, their cross products are equal.

• NO, their cross products are not equal.

• 45

• 25

Do these ratios form a proportion?

If YES please also select the cross product.

• Yes, their cross products are equal.

• NO, their cross products are not equal.

• 20

• 40

Do these ratios form a proportion?

If YES please also select the cross product.

• Yes, their cross products are equal.

• NO, their cross products are not equal.

• 48

• 32