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Finding the Fourth Proportional to 19,769,609.70, 29,654,414.55 and 12,116,859.30

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Solution

The fourth proportional to 19,769,609.70, 29,654,414.55 and 12,116,859.30 is: 18,175,288.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,769,609.70 : 29,654,414.55 = 12,116,859.30 : x
  2. Step 2: Convert to fraction form
    19,769,609.70/29,654,414.55 = 12,116,859.30/x
  3. Step 3: Cross multiply
    19,769,609.70x = 29,654,414.55 × 12,116,859.30
  4. Step 4: Simplify right side
    19,769,609.70x = 359,318,368,726,222.88
  5. Step 5: Solve for x
    x = 359,318,368,726,222.88/19,769,609.70
  6. Step 6: Final answer
    x = 18,175,288.95

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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.