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Finding the Fourth Proportional to 28,691.97, 43,040.44 and 7,915.47

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Solution

The fourth proportional to 28,691.97, 43,040.44 and 7,915.47 is: 11,873.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,691.97 : 43,040.44 = 7,915.47 : x
  2. Step 2: Convert to fraction form
    28,691.97/43,040.44 = 7,915.47/x
  3. Step 3: Cross multiply
    28,691.97x = 43,040.44 × 7,915.47
  4. Step 4: Simplify right side
    28,691.97x = 340,685,272.03
  5. Step 5: Solve for x
    x = 340,685,272.03/28,691.97
  6. Step 6: Final answer
    x = 11,873.89

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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.