Home / 39,657.90-54,729.42-21,753.66

Finding the Fourth Proportional to 39,657.90, 54,729.42 and 21,753.66

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Solution

The fourth proportional to 39,657.90, 54,729.42 and 21,753.66 is: 30,020.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,657.90 : 54,729.42 = 21,753.66 : x
  2. Step 2: Convert to fraction form
    39,657.90/54,729.42 = 21,753.66/x
  3. Step 3: Cross multiply
    39,657.90x = 54,729.42 × 21,753.66
  4. Step 4: Simplify right side
    39,657.90x = 1,190,565,194.68
  5. Step 5: Solve for x
    x = 1,190,565,194.68/39,657.90
  6. Step 6: Final answer
    x = 30,020.88

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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.