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Finding the Fourth Proportional to 39,469.86, 54,469.19 and 21,565.98

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Solution

The fourth proportional to 39,469.86, 54,469.19 and 21,565.98 is: 29,761.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,469.86 : 54,469.19 = 21,565.98 : x
  2. Step 2: Convert to fraction form
    39,469.86/54,469.19 = 21,565.98/x
  3. Step 3: Cross multiply
    39,469.86x = 54,469.19 × 21,565.98
  4. Step 4: Simplify right side
    39,469.86x = 1,174,681,462.16
  5. Step 5: Solve for x
    x = 1,174,681,462.16/39,469.86
  6. Step 6: Final answer
    x = 29,761.48

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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.