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Finding the Fourth Proportional to 38,132.40, 57,209.40 and 11,839.80

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Solution

The fourth proportional to 38,132.40, 57,209.40 and 11,839.80 is: 17,763.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,132.40 : 57,209.40 = 11,839.80 : x
  2. Step 2: Convert to fraction form
    38,132.40/57,209.40 = 11,839.80/x
  3. Step 3: Cross multiply
    38,132.40x = 57,209.40 × 11,839.80
  4. Step 4: Simplify right side
    38,132.40x = 677,347,854.12
  5. Step 5: Solve for x
    x = 677,347,854.12/38,132.40
  6. Step 6: Final answer
    x = 17,763.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.