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Finding the Fourth Proportional to 12,471,937.10, 18,707,905.65 and 8,216,909.90

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Solution

The fourth proportional to 12,471,937.10, 18,707,905.65 and 8,216,909.90 is: 12,325,364.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,471,937.10 : 18,707,905.65 = 8,216,909.90 : x
  2. Step 2: Convert to fraction form
    12,471,937.10/18,707,905.65 = 8,216,909.90/x
  3. Step 3: Cross multiply
    12,471,937.10x = 18,707,905.65 × 8,216,909.90
  4. Step 4: Simplify right side
    12,471,937.10x = 153,721,175,143,750.94
  5. Step 5: Solve for x
    x = 153,721,175,143,750.94/12,471,937.10
  6. Step 6: Final answer
    x = 12,325,364.85

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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.