Question

Find the unknown number in the proportion. Round answer to the nearest thousandths when necessary.
one half
​= StartFraction x Over 11 EndFraction

Answer 1

To solve the proportion \( \frac{1}{2} = \frac{x}{11} \), you can cross-multiply:

\[
1 \cdot 11 = 2 \cdot x
\]

This simplifies to:

\[
11 = 2x
\]

To isolate \( x \), divide both sides by 2:

\[
x = \frac{11}{2}
\]

Now calculate \( \frac{11}{2} \):

\[
x = 5.5
\]

Thus, the unknown number \( x \) is \( 5.500 \) when rounded to the nearest thousandth.