Answer:
(c) The value of variable a is 12.5.
Step-by-step explanation:
4 is to 5 as 10 is to a.
or, 4 : 5 = 10 : a
By the RATIO OF PROPORTIONALITY:
[tex]\frac{4}{5} = \frac{10}{a} \\\implies a = \frac{10 \times 5}{4} = 12. 5[/tex]
or, the value of a = 12. 5
⇒ 4 is to 5 as 10 is to 12.5
Hence, the value of variable a is 12.5.
