Finding the Fourth Proportional to 20,628,305.96, 28,455,208.16 and 12,879,896.18
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Solution
The fourth proportional to 20,628,305.96, 28,455,208.16 and 12,879,896.18 is: 17,766,855.28
Step by Step Solution
- Step 1: Write the proportion equation
20,628,305.96 : 28,455,208.16 = 12,879,896.18 : x - Step 2: Convert to fraction form
20,628,305.96/28,455,208.16 = 12,879,896.18/x - Step 3: Cross multiply
20,628,305.96x = 28,455,208.16 × 12,879,896.18 - Step 4: Simplify right side
20,628,305.96x = 366,500,126,674,413.31 - Step 5: Solve for x
x = 366,500,126,674,413.31/20,628,305.96 - Step 6: Final answer
x = 17,766,855.28
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.