Home / 12,470.60-18,731.82-9,891.56

Finding the Fourth Proportional to 12,470.60, 18,731.82 and 9,891.56

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Solution

The fourth proportional to 12,470.60, 18,731.82 and 9,891.56 is: 14,857.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,470.60 : 18,731.82 = 9,891.56 : x
  2. Step 2: Convert to fraction form
    12,470.60/18,731.82 = 9,891.56/x
  3. Step 3: Cross multiply
    12,470.60x = 18,731.82 × 9,891.56
  4. Step 4: Simplify right side
    12,470.60x = 185,286,921.44
  5. Step 5: Solve for x
    x = 185,286,921.44/12,470.60
  6. Step 6: Final answer
    x = 14,857.90

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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.