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Finding the Fourth Proportional to 18,966,139.92, 28,420,472.52 and 12,553,418.52

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Solution

The fourth proportional to 18,966,139.92, 28,420,472.52 and 12,553,418.52 is: 18,811,106.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,966,139.92 : 28,420,472.52 = 12,553,418.52 : x
  2. Step 2: Convert to fraction form
    18,966,139.92/28,420,472.52 = 12,553,418.52/x
  3. Step 3: Cross multiply
    18,966,139.92x = 28,420,472.52 × 12,553,418.52
  4. Step 4: Simplify right side
    18,966,139.92x = 356,774,086,079,719.06
  5. Step 5: Solve for x
    x = 356,774,086,079,719.06/18,966,139.92
  6. Step 6: Final answer
    x = 18,811,106.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.