Home / 20,836.38-31,254.57-9,149.70

Finding the Fourth Proportional to 20,836.38, 31,254.57 and 9,149.70

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Solution

The fourth proportional to 20,836.38, 31,254.57 and 9,149.70 is: 13,724.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.38 : 31,254.57 = 9,149.70 : x
  2. Step 2: Convert to fraction form
    20,836.38/31,254.57 = 9,149.70/x
  3. Step 3: Cross multiply
    20,836.38x = 31,254.57 × 9,149.70
  4. Step 4: Simplify right side
    20,836.38x = 285,969,939.13
  5. Step 5: Solve for x
    x = 285,969,939.13/20,836.38
  6. Step 6: Final answer
    x = 13,724.55

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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.