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Finding the Fourth Proportional to 18,332.80, 27,499.20 and 12,427.90

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Solution

The fourth proportional to 18,332.80, 27,499.20 and 12,427.90 is: 18,641.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,332.80 : 27,499.20 = 12,427.90 : x
  2. Step 2: Convert to fraction form
    18,332.80/27,499.20 = 12,427.90/x
  3. Step 3: Cross multiply
    18,332.80x = 27,499.20 × 12,427.90
  4. Step 4: Simplify right side
    18,332.80x = 341,757,307.68
  5. Step 5: Solve for x
    x = 341,757,307.68/18,332.80
  6. Step 6: Final answer
    x = 18,641.85

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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.