Home / 20,834.28-31,251.44-5,251.91

Finding the Fourth Proportional to 20,834.28, 31,251.44 and 5,251.91

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Solution

The fourth proportional to 20,834.28, 31,251.44 and 5,251.91 is: 7,877.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,834.28 : 31,251.44 = 5,251.91 : x
  2. Step 2: Convert to fraction form
    20,834.28/31,251.44 = 5,251.91/x
  3. Step 3: Cross multiply
    20,834.28x = 31,251.44 × 5,251.91
  4. Step 4: Simplify right side
    20,834.28x = 164,129,750.25
  5. Step 5: Solve for x
    x = 164,129,750.25/20,834.28
  6. Step 6: Final answer
    x = 7,877.87

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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.