Home / 20,819.62-31,239.68-9,724.69

Finding the Fourth Proportional to 20,819.62, 31,239.68 and 9,724.69

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Solution

The fourth proportional to 20,819.62, 31,239.68 and 9,724.69 is: 14,591.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.62 : 31,239.68 = 9,724.69 : x
  2. Step 2: Convert to fraction form
    20,819.62/31,239.68 = 9,724.69/x
  3. Step 3: Cross multiply
    20,819.62x = 31,239.68 × 9,724.69
  4. Step 4: Simplify right side
    20,819.62x = 303,796,203.70
  5. Step 5: Solve for x
    x = 303,796,203.70/20,819.62
  6. Step 6: Final answer
    x = 14,591.82

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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.