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Finding the Fourth Proportional to 42,481.90, 63,722.85 and 14,779.90

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Solution

The fourth proportional to 42,481.90, 63,722.85 and 14,779.90 is: 22,169.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,481.90 : 63,722.85 = 14,779.90 : x
  2. Step 2: Convert to fraction form
    42,481.90/63,722.85 = 14,779.90/x
  3. Step 3: Cross multiply
    42,481.90x = 63,722.85 × 14,779.90
  4. Step 4: Simplify right side
    42,481.90x = 941,817,350.72
  5. Step 5: Solve for x
    x = 941,817,350.72/42,481.90
  6. Step 6: Final answer
    x = 22,169.85

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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.