Home / 20,869.14-31,287.27-10,331.79

Finding the Fourth Proportional to 20,869.14, 31,287.27 and 10,331.79

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Solution

The fourth proportional to 20,869.14, 31,287.27 and 10,331.79 is: 15,489.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.14 : 31,287.27 = 10,331.79 : x
  2. Step 2: Convert to fraction form
    20,869.14/31,287.27 = 10,331.79/x
  3. Step 3: Cross multiply
    20,869.14x = 31,287.27 × 10,331.79
  4. Step 4: Simplify right side
    20,869.14x = 323,253,503.31
  5. Step 5: Solve for x
    x = 323,253,503.31/20,869.14
  6. Step 6: Final answer
    x = 15,489.55

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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.