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Finding the Fourth Proportional to 21,143.44, 29,174.44 and 13,591.44

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Solution

The fourth proportional to 21,143.44, 29,174.44 and 13,591.44 is: 18,753.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.44 : 29,174.44 = 13,591.44 : x
  2. Step 2: Convert to fraction form
    21,143.44/29,174.44 = 13,591.44/x
  3. Step 3: Cross multiply
    21,143.44x = 29,174.44 × 13,591.44
  4. Step 4: Simplify right side
    21,143.44x = 396,522,650.79
  5. Step 5: Solve for x
    x = 396,522,650.79/21,143.44
  6. Step 6: Final answer
    x = 18,753.93

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1.5x scale

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.