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Finding the Fourth Proportional to 7,843.26, 11,766.69 and 2,578.72

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Solution

The fourth proportional to 7,843.26, 11,766.69 and 2,578.72 is: 3,868.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,843.26 : 11,766.69 = 2,578.72 : x
  2. Step 2: Convert to fraction form
    7,843.26/11,766.69 = 2,578.72/x
  3. Step 3: Cross multiply
    7,843.26x = 11,766.69 × 2,578.72
  4. Step 4: Simplify right side
    7,843.26x = 30,342,940.00
  5. Step 5: Solve for x
    x = 30,342,940.00/7,843.26
  6. Step 6: Final answer
    x = 3,868.66

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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.