Question

Solve the proportion: 5/x = 8/15

Answer 1

\[\frac{ 5 }{ x } = \frac{ 8 }{ 15 } \]
\[\frac{ 5x }{ x } = \frac{ 8x }{ 15 }\]
\[5 = \frac{ 8x }{ 15 }\]
Swapping x to the left
\[\frac{ 8x }{ 15 } = 5\]
\[\frac{ 8x }{ 15 } \times \frac{ 15 }{ 8 } = 5 \times \frac{ 15 }{ 8 }\]
\[x=\frac{ 75 }{ 8 }\]