Home / 38,432.40-57,650.40-12,139.20

Finding the Fourth Proportional to 38,432.40, 57,650.40 and 12,139.20

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Solution

The fourth proportional to 38,432.40, 57,650.40 and 12,139.20 is: 18,209.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,432.40 : 57,650.40 = 12,139.20 : x
  2. Step 2: Convert to fraction form
    38,432.40/57,650.40 = 12,139.20/x
  3. Step 3: Cross multiply
    38,432.40x = 57,650.40 × 12,139.20
  4. Step 4: Simplify right side
    38,432.40x = 699,829,735.68
  5. Step 5: Solve for x
    x = 699,829,735.68/38,432.40
  6. Step 6: Final answer
    x = 18,209.37

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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.