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Finding the Fourth Proportional to 39,469.70, 54,468.97 and 21,565.82

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Solution

The fourth proportional to 39,469.70, 54,468.97 and 21,565.82 is: 29,761.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,469.70 : 54,468.97 = 21,565.82 : x
  2. Step 2: Convert to fraction form
    39,469.70/54,468.97 = 21,565.82/x
  3. Step 3: Cross multiply
    39,469.70x = 54,468.97 × 21,565.82
  4. Step 4: Simplify right side
    39,469.70x = 1,174,667,899.78
  5. Step 5: Solve for x
    x = 1,174,667,899.78/39,469.70
  6. Step 6: Final answer
    x = 29,761.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.