Home / 18,505.20-27,757.80-8,663.70

Finding the Fourth Proportional to 18,505.20, 27,757.80 and 8,663.70

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Solution

The fourth proportional to 18,505.20, 27,757.80 and 8,663.70 is: 12,995.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,505.20 : 27,757.80 = 8,663.70 : x
  2. Step 2: Convert to fraction form
    18,505.20/27,757.80 = 8,663.70/x
  3. Step 3: Cross multiply
    18,505.20x = 27,757.80 × 8,663.70
  4. Step 4: Simplify right side
    18,505.20x = 240,485,251.86
  5. Step 5: Solve for x
    x = 240,485,251.86/18,505.20
  6. Step 6: Final answer
    x = 12,995.55

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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.