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Finding the Fourth Proportional to 39,332, 54,278.24 and 21,668

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Solution

The fourth proportional to 39,332, 54,278.24 and 21,668 is: 29,901.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,332 : 54,278.24 = 21,668 : x
  2. Step 2: Convert to fraction form
    39,332/54,278.24 = 21,668/x
  3. Step 3: Cross multiply
    39,332x = 54,278.24 × 21,668
  4. Step 4: Simplify right side
    39,332x = 1,176,100,904.32
  5. Step 5: Solve for x
    x = 1,176,100,904.32/39,332
  6. Step 6: Final answer
    x = 29,901.88

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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.