Home / 42,138.20-63,231.60-15,861.80

Finding the Fourth Proportional to 42,138.20, 63,231.60 and 15,861.80

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Solution

The fourth proportional to 42,138.20, 63,231.60 and 15,861.80 is: 23,801.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,138.20 : 63,231.60 = 15,861.80 : x
  2. Step 2: Convert to fraction form
    42,138.20/63,231.60 = 15,861.80/x
  3. Step 3: Cross multiply
    42,138.20x = 63,231.60 × 15,861.80
  4. Step 4: Simplify right side
    42,138.20x = 1,002,966,992.88
  5. Step 5: Solve for x
    x = 1,002,966,992.88/42,138.20
  6. Step 6: Final answer
    x = 23,801.85

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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.