Answer:
n = 36
Step-by-step explanation:
4 : 5 = n : 45
It can be also written as :-
[tex]\frac{4}{5} = \frac{n}{45}[/tex]
Multiplying both the sides by 45 ,
[tex]=> \frac{4}{5} \times 45 = \frac{n}{45} \times 45[/tex]
[tex]=> n = 4 \times 9 = 36[/tex]
