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Finding the Fourth Proportional to 13,869,691.90, 20,804,537.85 and 8,494,920.70

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Solution

The fourth proportional to 13,869,691.90, 20,804,537.85 and 8,494,920.70 is: 12,742,381.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869,691.90 : 20,804,537.85 = 8,494,920.70 : x
  2. Step 2: Convert to fraction form
    13,869,691.90/20,804,537.85 = 8,494,920.70/x
  3. Step 3: Cross multiply
    13,869,691.90x = 20,804,537.85 × 8,494,920.70
  4. Step 4: Simplify right side
    13,869,691.90x = 176,732,899,235,898.50
  5. Step 5: Solve for x
    x = 176,732,899,235,898.50/13,869,691.90
  6. Step 6: Final answer
    x = 12,742,381.05

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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.