Home / 20,620.62-30,909.80-8,135.60

Finding the Fourth Proportional to 20,620.62, 30,909.80 and 8,135.60

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Solution

The fourth proportional to 20,620.62, 30,909.80 and 8,135.60 is: 12,195.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.62 : 30,909.80 = 8,135.60 : x
  2. Step 2: Convert to fraction form
    20,620.62/30,909.80 = 8,135.60/x
  3. Step 3: Cross multiply
    20,620.62x = 30,909.80 × 8,135.60
  4. Step 4: Simplify right side
    20,620.62x = 251,469,634.67
  5. Step 5: Solve for x
    x = 251,469,634.67/20,620.62
  6. Step 6: Final answer
    x = 12,195.06

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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.