Use the unitary method: let the smallest part be 1 unit, then express the other parts in units.

Let the thousandths digit be 1 unit.
Tenths digit	=	2 x thousandths = 2 units
Hundredths digit	=	2 x tenths = 2 x 2 = 4 units
Total units	=	1 + 2 + 4 = 7 units
1 unit	=	14 / 7 = 2
Thousandths = 2, tenths = 4, hundredths = 8.
The number is between 7 and 8, so the whole-number part is 7.
The decimal	=	7.482