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Finding the Fourth Proportional to 48,648.30, 72,972.45 and 13,587.90

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Solution

The fourth proportional to 48,648.30, 72,972.45 and 13,587.90 is: 20,381.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,648.30 : 72,972.45 = 13,587.90 : x
  2. Step 2: Convert to fraction form
    48,648.30/72,972.45 = 13,587.90/x
  3. Step 3: Cross multiply
    48,648.30x = 72,972.45 × 13,587.90
  4. Step 4: Simplify right side
    48,648.30x = 991,542,353.36
  5. Step 5: Solve for x
    x = 991,542,353.36/48,648.30
  6. Step 6: Final answer
    x = 20,381.85

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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.