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Finding the Fourth Proportional to 42,449.70, 63,683.79 and 15,791.53

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Solution

The fourth proportional to 42,449.70, 63,683.79 and 15,791.53 is: 23,690.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,449.70 : 63,683.79 = 15,791.53 : x
  2. Step 2: Convert to fraction form
    42,449.70/63,683.79 = 15,791.53/x
  3. Step 3: Cross multiply
    42,449.70x = 63,683.79 × 15,791.53
  4. Step 4: Simplify right side
    42,449.70x = 1,005,664,480.30
  5. Step 5: Solve for x
    x = 1,005,664,480.30/42,449.70
  6. Step 6: Final answer
    x = 23,690.73

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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.