Home / 18,520.80-27,781.20-8,132.55

Finding the Fourth Proportional to 18,520.80, 27,781.20 and 8,132.55

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Solution

The fourth proportional to 18,520.80, 27,781.20 and 8,132.55 is: 12,198.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,520.80 : 27,781.20 = 8,132.55 : x
  2. Step 2: Convert to fraction form
    18,520.80/27,781.20 = 8,132.55/x
  3. Step 3: Cross multiply
    18,520.80x = 27,781.20 × 8,132.55
  4. Step 4: Simplify right side
    18,520.80x = 225,931,998.06
  5. Step 5: Solve for x
    x = 225,931,998.06/18,520.80
  6. Step 6: Final answer
    x = 12,198.83

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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.