Finding the Fourth Proportional to 20,358,041.79, 28,107,625.92 and 15,640,034.31
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Solution
The fourth proportional to 20,358,041.79, 28,107,625.92 and 15,640,034.31 is: 21,593,640.40
Step by Step Solution
- Step 1: Write the proportion equation
20,358,041.79 : 28,107,625.92 = 15,640,034.31 : x - Step 2: Convert to fraction form
20,358,041.79/28,107,625.92 = 15,640,034.31/x - Step 3: Cross multiply
20,358,041.79x = 28,107,625.92 × 15,640,034.31 - Step 4: Simplify right side
20,358,041.79x = 439,604,233,761,445.38 - Step 5: Solve for x
x = 439,604,233,761,445.38/20,358,041.79 - Step 6: Final answer
x = 21,593,640.40
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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.