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Finding the Fourth Proportional to 40,691.72, 61,077.04 and 19,646.61

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Solution

The fourth proportional to 40,691.72, 61,077.04 and 19,646.61 is: 29,488.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,691.72 : 61,077.04 = 19,646.61 : x
  2. Step 2: Convert to fraction form
    40,691.72/61,077.04 = 19,646.61/x
  3. Step 3: Cross multiply
    40,691.72x = 61,077.04 × 19,646.61
  4. Step 4: Simplify right side
    40,691.72x = 1,199,956,506.68
  5. Step 5: Solve for x
    x = 1,199,956,506.68/40,691.72
  6. Step 6: Final answer
    x = 29,488.96

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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.