Home / 20,819.28-31,223.16-8,337.36

Finding the Fourth Proportional to 20,819.28, 31,223.16 and 8,337.36

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Solution

The fourth proportional to 20,819.28, 31,223.16 and 8,337.36 is: 12,503.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.28 : 31,223.16 = 8,337.36 : x
  2. Step 2: Convert to fraction form
    20,819.28/31,223.16 = 8,337.36/x
  3. Step 3: Cross multiply
    20,819.28x = 31,223.16 × 8,337.36
  4. Step 4: Simplify right side
    20,819.28x = 260,318,725.26
  5. Step 5: Solve for x
    x = 260,318,725.26/20,819.28
  6. Step 6: Final answer
    x = 12,503.73

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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.