Home / 39,229.97-54,138.42-21,326.18

Finding the Fourth Proportional to 39,229.97, 54,138.42 and 21,326.18

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Solution

The fourth proportional to 39,229.97, 54,138.42 and 21,326.18 is: 29,430.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,229.97 : 54,138.42 = 21,326.18 : x
  2. Step 2: Convert to fraction form
    39,229.97/54,138.42 = 21,326.18/x
  3. Step 3: Cross multiply
    39,229.97x = 54,138.42 × 21,326.18
  4. Step 4: Simplify right side
    39,229.97x = 1,154,565,419.14
  5. Step 5: Solve for x
    x = 1,154,565,419.14/39,229.97
  6. Step 6: Final answer
    x = 29,430.70

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Double scale
Find fourth proportional to 39,230.97, 54,139.80 and 21,327.18
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1.5x scale

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.