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Finding the Fourth Proportional to 20,479.52, 30,700.98 and 7,996.62

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Solution

The fourth proportional to 20,479.52, 30,700.98 and 7,996.62 is: 11,987.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.52 : 30,700.98 = 7,996.62 : x
  2. Step 2: Convert to fraction form
    20,479.52/30,700.98 = 7,996.62/x
  3. Step 3: Cross multiply
    20,479.52x = 30,700.98 × 7,996.62
  4. Step 4: Simplify right side
    20,479.52x = 245,504,070.69
  5. Step 5: Solve for x
    x = 245,504,070.69/20,479.52
  6. Step 6: Final answer
    x = 11,987.78

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1.5x scale

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.