Home / 7,814.97-11,721.20-3,431.61

Finding the Fourth Proportional to 7,814.97, 11,721.20 and 3,431.61

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Solution

The fourth proportional to 7,814.97, 11,721.20 and 3,431.61 is: 5,146.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,814.97 : 11,721.20 = 3,431.61 : x
  2. Step 2: Convert to fraction form
    7,814.97/11,721.20 = 3,431.61/x
  3. Step 3: Cross multiply
    7,814.97x = 11,721.20 × 3,431.61
  4. Step 4: Simplify right side
    7,814.97x = 40,222,569.97
  5. Step 5: Solve for x
    x = 40,222,569.97/7,814.97
  6. Step 6: Final answer
    x = 5,146.86

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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.