Question

Solve for y in the proportion.

y/21 = 40/70


y =

Answer 1

To solve for \( y \) in the proportion \( \frac{y}{21} = \frac{40}{70} \), we can use cross multiplication.

Cross multiplying gives us:

\[
y \times 70 = 21 \times 40
\]

Now, calculating the right side:

\[
21 \times 40 = 840
\]

So we have:

\[
70y = 840
\]

Next, we can solve for \( y \) by dividing both sides by 70:

\[
y = \frac{840}{70}
\]

Calculating the division:

\[
y = 12
\]

Thus, the solution is:

\[
y = 12
\]