Home / 20,573.28-28,391.10-11,141.88

Finding the Fourth Proportional to 20,573.28, 28,391.10 and 11,141.88

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Solution

The fourth proportional to 20,573.28, 28,391.10 and 11,141.88 is: 15,375.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,573.28 : 28,391.10 = 11,141.88 : x
  2. Step 2: Convert to fraction form
    20,573.28/28,391.10 = 11,141.88/x
  3. Step 3: Cross multiply
    20,573.28x = 28,391.10 × 11,141.88
  4. Step 4: Simplify right side
    20,573.28x = 316,330,229.27
  5. Step 5: Solve for x
    x = 316,330,229.27/20,573.28
  6. Step 6: Final answer
    x = 15,375.78

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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.