Home / 42,543.20-63,809.40-11,380.88

Finding the Fourth Proportional to 42,543.20, 63,809.40 and 11,380.88

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Solution

The fourth proportional to 42,543.20, 63,809.40 and 11,380.88 is: 17,069.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,543.20 : 63,809.40 = 11,380.88 : x
  2. Step 2: Convert to fraction form
    42,543.20/63,809.40 = 11,380.88/x
  3. Step 3: Cross multiply
    42,543.20x = 63,809.40 × 11,380.88
  4. Step 4: Simplify right side
    42,543.20x = 726,207,124.27
  5. Step 5: Solve for x
    x = 726,207,124.27/42,543.20
  6. Step 6: Final answer
    x = 17,069.88

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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.