Home / 42,101.20-63,161.68-12,519.28

Finding the Fourth Proportional to 42,101.20, 63,161.68 and 12,519.28

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Solution

The fourth proportional to 42,101.20, 63,161.68 and 12,519.28 is: 18,781.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,101.20 : 63,161.68 = 12,519.28 : x
  2. Step 2: Convert to fraction form
    42,101.20/63,161.68 = 12,519.28/x
  3. Step 3: Cross multiply
    42,101.20x = 63,161.68 × 12,519.28
  4. Step 4: Simplify right side
    42,101.20x = 790,738,757.19
  5. Step 5: Solve for x
    x = 790,738,757.19/42,101.20
  6. Step 6: Final answer
    x = 18,781.86

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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.