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Finding the Fourth Proportional to 27,286.20, 40,921.20 and 10,636.65

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Solution

The fourth proportional to 27,286.20, 40,921.20 and 10,636.65 is: 15,951.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,286.20 : 40,921.20 = 10,636.65 : x
  2. Step 2: Convert to fraction form
    27,286.20/40,921.20 = 10,636.65/x
  3. Step 3: Cross multiply
    27,286.20x = 40,921.20 × 10,636.65
  4. Step 4: Simplify right side
    27,286.20x = 435,264,481.98
  5. Step 5: Solve for x
    x = 435,264,481.98/27,286.20
  6. Step 6: Final answer
    x = 15,951.82

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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.