Answer:
600W = C
Step-by-step explanation:
First we must identify the relationship between weight of gold and cost of gold.
We can do this by dividing cost by corresponding weight.
7200 / 12 = 600
13200 / 22 = 600
19200 / 32 = 600
each proportion has an outcome of 600
Therefore Cost = Weight times 600 or C = 600W
x=1045/13
let x be the unknown side
here 13,19 & 55,x are in proportion
13:19=55:x
13/19=55/x
13x=55×19