Finding the Fourth Proportional to 15,391,836.90, 21,240,983.41 and 8,423,119.95
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Solution
The fourth proportional to 15,391,836.90, 21,240,983.41 and 8,423,119.95 is: 11,624,041.52
Step by Step Solution
- Step 1: Write the proportion equation
15,391,836.90 : 21,240,983.41 = 8,423,119.95 : x - Step 2: Convert to fraction form
15,391,836.90/21,240,983.41 = 8,423,119.95/x - Step 3: Cross multiply
15,391,836.90x = 21,240,983.41 × 8,423,119.95 - Step 4: Simplify right side
15,391,836.90x = 178,915,351,118,390 - Step 5: Solve for x
x = 178,915,351,118,390/15,391,836.90 - Step 6: Final answer
x = 11,624,041.52
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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.