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23 votes
7:21=10:3z
find the value of x in this ratio


User ShadyBears
by
8.8k points

1 Answer

3 votes

Answer:

z=10

Explanation:

We know that the ratio 7:21 is equal to the ratio of 10:3z.

Let's model that in proportions:

7 10

- = -

21 3z

Now that the equation is in proportional form, we can cross-multiply to find the value of z.

7 * 3z = 21 * 10 - Multiply both sides

21z = 210 - Divide both sides by 21

z=10

The answer is z=10.

User Yingqiang Gao
by
6.8k points

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