Answer :
Given:
Let the missing value be x.
The ratio of 1.3 to 38 is the same as the ratio of 3.9 to x.
[tex]\frac{1.3}{38}=\frac{3.9}{x}[/tex]Solve the equation for x,
[tex]\begin{gathered} \frac{1.3}{38}=\frac{3.9}{x} \\ 1.3x=3.9\times38 \\ 1.3x=148.2 \\ x=\frac{148.2}{1.3} \\ x=114 \end{gathered}[/tex]Answer: The missing value is 114.