Home / 42,439.20-63,616.80-18,759.60

Finding the Fourth Proportional to 42,439.20, 63,616.80 and 18,759.60

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Solution

The fourth proportional to 42,439.20, 63,616.80 and 18,759.60 is: 28,120.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,439.20 : 63,616.80 = 18,759.60 : x
  2. Step 2: Convert to fraction form
    42,439.20/63,616.80 = 18,759.60/x
  3. Step 3: Cross multiply
    42,439.20x = 63,616.80 × 18,759.60
  4. Step 4: Simplify right side
    42,439.20x = 1,193,425,721.28
  5. Step 5: Solve for x
    x = 1,193,425,721.28/42,439.20
  6. Step 6: Final answer
    x = 28,120.83

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1.5x scale

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.