One-third of five-nineth of a number is 37.5% of 1800. What is the number?

Question

Find a five-digit number in which the last number is the sum of the first, second, and third; the third is four less than the last; the fourth is two less than the last; and the first and fourth added are one less than the last. The last number is also three times the second.

Answer 1

3645

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x*1/3*5/9=1800*37.5/100
x=3645

Answer 2

Let X be the number, then we can write the following equation:
1 / 3 x ( 5/9 X ) = 37,5/100 (1800)
By solving this equation, X = 3645