Solving Proportions with Cross Products

Solve.

• A

• B

• C

• D

For the pair of similar figures, find the length of each side marked with a variable.

• x = 7.2 cm; y = 13.4 cm

• x = 12cm; y = 15 cm

• x = 12.5 cm; y = 9.6 cm

• x = 15 cm; y = 12 cm

Solve the proportion.

• k=5

• k=3.3333333

• k=60

• k=90

Solve for x 

• x = 16

• x = 28

• x = 1/26

• x = 26

Solve.

• 4

• 1

• 16

• 2

Solve the proportion:

• 3

• 4

• 9

• 6

Cross Multiply/Cross Products

• 15

• 420

• 28

• 16

Solve the proportion.

• p=31.3

• p=308

• p=924

• p=532

• Yes, they form a proportion.

• No, they do not form a proportion.

Solve for x

• x=6

• x =1/6

• x = 7

• x=9