Proportions and Cross Products

Solve.

• 4

• 1

• 16

• 2

Two quantities are proportional if their ____ are equal

• numerators

• denominators

• cross products

• units

Determine whether the ratios form a proportion:

• Proportional

• Not Proportional

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

Jennifer babysat on Friday and made $96 in 8 hours. On Sunday, she babysat for 12 hours and made $144. Was the amount she earned each day proportional to the number of hours that she worked?

• Yes, the cross product is 1152.

• Yes, the cross product is 768.

• No, the cross products are not equal.

• Yes, the cross product is 1728.

There are 960 calories in 8 servings of Amy's cookies. There are 460 calories in 2 servings of Henry's cookies. Do the two rates form proportions?

• Yes, their cross product is 1920.

• Yes, their cross product is 3680.

• No, their cross products are not equal.

• Yes, their cross product is 7680.

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