Finding the Fourth Proportional to 28,551,221.78, 39,400,736.04 and 15,498,489.54
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Solution
The fourth proportional to 28,551,221.78, 39,400,736.04 and 15,498,489.54 is: 21,387,942.70
Step by Step Solution
- Step 1: Write the proportion equation
28,551,221.78 : 39,400,736.04 = 15,498,489.54 : x - Step 2: Convert to fraction form
28,551,221.78/39,400,736.04 = 15,498,489.54/x - Step 3: Cross multiply
28,551,221.78x = 39,400,736.04 × 15,498,489.54 - Step 4: Simplify right side
28,551,221.78x = 610,651,895,384,241 - Step 5: Solve for x
x = 610,651,895,384,241/28,551,221.78 - Step 6: Final answer
x = 21,387,942.70
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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.