Proportional Cross Products

Determine if the two ratios are proportional by simplifying or using cross products. Then, correctly fill in the blank.

• >

• <

• =

Which scenario is represented by the double number line?

• People eat three Milky Ways for every Snickers.

• The constant of proportionality is two.

• Last Halloween, Johnny collected three Milky Ways to every two Snickers.

• A factory makes six Snickers for every four Milky Ways.

• Snickers are smaller than Milky Ways.

What ratio will complete the proportional ratio table?

• 8/2

• 16/2

• 9/2

• 14/2

What is the constant of proportionality?

• 2

• 8

• 4

• 12

Two quantities are proportional if their ____ are equal

• numerators

• denominators

• cross products

• units

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.

Determine whether the ratios form a proportion:

• Proportional

• Not Proportional