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Finding the Fourth Proportional to 18,591,689.50, 25,629,490.96 and 12,992,552.21

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Solution

The fourth proportional to 18,591,689.50, 25,629,490.96 and 12,992,552.21 is: 17,910,825.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,591,689.50 : 25,629,490.96 = 12,992,552.21 : x
  2. Step 2: Convert to fraction form
    18,591,689.50/25,629,490.96 = 12,992,552.21/x
  3. Step 3: Cross multiply
    18,591,689.50x = 25,629,490.96 × 12,992,552.21
  4. Step 4: Simplify right side
    18,591,689.50x = 332,992,499,445,115.38
  5. Step 5: Solve for x
    x = 332,992,499,445,115.38/18,591,689.50
  6. Step 6: Final answer
    x = 17,910,825.13

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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.