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Finding the Fourth Proportional to 7,791.96, 11,689.50 and 2,861.64

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Solution

The fourth proportional to 7,791.96, 11,689.50 and 2,861.64 is: 4,293.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,791.96 : 11,689.50 = 2,861.64 : x
  2. Step 2: Convert to fraction form
    7,791.96/11,689.50 = 2,861.64/x
  3. Step 3: Cross multiply
    7,791.96x = 11,689.50 × 2,861.64
  4. Step 4: Simplify right side
    7,791.96x = 33,451,140.78
  5. Step 5: Solve for x
    x = 33,451,140.78/7,791.96
  6. Step 6: Final answer
    x = 4,293.03

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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.