Question

Use cross multiplication to solve the following proportion for x.

7/9 = x/27

(Please include steps)

Answer 1

X is equal to 21 7/9 times x/27 is 9x=189 and that is 21

Answer 2

x = 21

Explanation:

It's easier, tho' not essential, to re-write this equation as

7 x

---- = ------

9 27

To cross-multiply: draw an imaginary line diagonally through 9 and x. Multiplying, we get 9x. Do the same with the other diagonal, through 7 and 27: we get 7(27) = 189.

Then we have a new equation without fractions: 9x = 189.

Solve for x. To do this, divide both sides by 9, obtaining:

x = 21