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Finding the Fourth Proportional to 7,881.76, 11,825.07 and 5,691.25

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Solution

The fourth proportional to 7,881.76, 11,825.07 and 5,691.25 is: 8,538.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.76 : 11,825.07 = 5,691.25 : x
  2. Step 2: Convert to fraction form
    7,881.76/11,825.07 = 5,691.25/x
  3. Step 3: Cross multiply
    7,881.76x = 11,825.07 × 5,691.25
  4. Step 4: Simplify right side
    7,881.76x = 67,299,429.64
  5. Step 5: Solve for x
    x = 67,299,429.64/7,881.76
  6. Step 6: Final answer
    x = 8,538.63

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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.