Answer:
[tex]\huge\boxed{ x = 75 k}[/tex]
Step-by-step explanation:
The given ratio is:
=> 5 : 1
Given that the smallest one is 15k
So, Let's built a proportion:
=> 5 : 1 = x : 15 [Where x is the unknown one]
Product of Means = Product of Extremes
x = 5 * 15
=> x = 75 k