Identify the value of x that makes each pair of ratios equivalent.

2. 5:15 and x:3

a. 5

b. 3

c. 1

c. 1

Step-by-step explanation:

5: 15 x:3

a:b c:d The ratios have to stay in proportion. So if we multiply a and b by a certain number they will equal c and d. We just don't know what that number is yet. Call it something.

a * something = c and b * something = d

5 * something = x

15 * something = 3

Solve for the unknown number we are multiplying by

Divide each side by 15

15/15 * something = 3/15

something = 1/5

Now that we know what we are multiplying by, we can solve for x

So 5 * something = x

5 * 1/5 = x

1 = x