Solve the proportion

Two equivalent ratios form a proportion.

Equivalent ratios have the same value.

Learn with an example

21/g = 7/16

g = ____

Solve for g in the proportion.

21/g = 7/16

21/g ( 16g ) = 7/16 ( 16g ) Multiply both sides by 16g

16 · 21 = 7g Simplify

336 = 7g Simplify

48 = g Divide both sides by 7

y/32 = 45/36

y = _____

Solve for y in the proportion.

y/32 = 45/36

y/32 ( 32 . 36 ) = 45/36 ( 32 . 36 ) Multiply both sides by 32 · 36

36y = 45 · 32 Simplify

36y = 1,440 Simplify

y = 40 Divide both sides by 36

d/26 = 18/12

d = ____

Solve for d in the proportion.

d/26 = 18/12

d/26 ( 26.12 ) = 18/12 ( 26 . 12 ) Multiply both sides by 26 · 12

12d = 18 · 26 Simplify

12d = 468 Simplify

d = 39 Divide both sides by 12

let’s practice! 🖊️