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Finding the Fourth Proportional to 18,785.52, 28,186.11 and 8,250.12

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Solution

The fourth proportional to 18,785.52, 28,186.11 and 8,250.12 is: 12,378.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.52 : 28,186.11 = 8,250.12 : x
  2. Step 2: Convert to fraction form
    18,785.52/28,186.11 = 8,250.12/x
  3. Step 3: Cross multiply
    18,785.52x = 28,186.11 × 8,250.12
  4. Step 4: Simplify right side
    18,785.52x = 232,538,789.83
  5. Step 5: Solve for x
    x = 232,538,789.83/18,785.52
  6. Step 6: Final answer
    x = 12,378.62

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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.