Home / 21,310.72-29,397.76-13,361.92

Finding the Fourth Proportional to 21,310.72, 29,397.76 and 13,361.92

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Solution

The fourth proportional to 21,310.72, 29,397.76 and 13,361.92 is: 18,432.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.72 : 29,397.76 = 13,361.92 : x
  2. Step 2: Convert to fraction form
    21,310.72/29,397.76 = 13,361.92/x
  3. Step 3: Cross multiply
    21,310.72x = 29,397.76 × 13,361.92
  4. Step 4: Simplify right side
    21,310.72x = 392,810,517.30
  5. Step 5: Solve for x
    x = 392,810,517.30/21,310.72
  6. Step 6: Final answer
    x = 18,432.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.