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Finding the Fourth Proportional to 8,791.76, 12,132.96 and 5,015.54

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Solution

The fourth proportional to 8,791.76, 12,132.96 and 5,015.54 is: 6,921.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,791.76 : 12,132.96 = 5,015.54 : x
  2. Step 2: Convert to fraction form
    8,791.76/12,132.96 = 5,015.54/x
  3. Step 3: Cross multiply
    8,791.76x = 12,132.96 × 5,015.54
  4. Step 4: Simplify right side
    8,791.76x = 60,853,376.53
  5. Step 5: Solve for x
    x = 60,853,376.53/8,791.76
  6. Step 6: Final answer
    x = 6,921.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.