1. EXAMPLE 4 Solve proportions Solve the proportion. ALGEBRA a. 5 10 x 16=
SOLUTION a. 5 10 x 16 =
Write original proportion. =
10 x
5 16
Cross Products Property =
10 x 80
Multiply. = x 8
Divide each side by 10.

2. EXAMPLE 4 Solve proportions b. 1 y + 1 = 2 3y SOLUTION 1 y + 1 2 3y b.
Write original proportion. =
2 (y + 1)
1 3y
Cross Products Property =
2y + 2 3y
Distributive Property = y 2
Subtract 2y from each side.

3. GUIDED PRACTICE
for Example 4
Solve the proportion. 5. 2 x 5 8 = 16 5
ANSWER 6. 1
x – 3 4 3x =
ANSWER 12 7.
y – 3 7 y 14 =
ANSWER 6