The value of [tex]n[/tex] is 13.
Given the proportion
[tex]20:n=40:26[/tex]
We can express it in fraction form as
[tex]\displaystyle \frac{20}{n}=\frac{40}{26}[/tex]
Cross multiply
[tex]20 \times 26=40n[/tex]
[tex]\implies 520=40n[/tex]
Divide both sides by 40, we yield [tex]n=13[/tex].
