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Finding the Fourth Proportional to 21,363.52, 32,020.85 and 13,361.92

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Solution

The fourth proportional to 21,363.52, 32,020.85 and 13,361.92 is: 20,027.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,363.52 : 32,020.85 = 13,361.92 : x
  2. Step 2: Convert to fraction form
    21,363.52/32,020.85 = 13,361.92/x
  3. Step 3: Cross multiply
    21,363.52x = 32,020.85 × 13,361.92
  4. Step 4: Simplify right side
    21,363.52x = 427,860,186.35
  5. Step 5: Solve for x
    x = 427,860,186.35/21,363.52
  6. Step 6: Final answer
    x = 20,027.61

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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.