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Finding the Fourth Proportional to 8,468.17, 11,691.78 and 5,286.31

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Solution

The fourth proportional to 8,468.17, 11,691.78 and 5,286.31 is: 7,298.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,468.17 : 11,691.78 = 5,286.31 : x
  2. Step 2: Convert to fraction form
    8,468.17/11,691.78 = 5,286.31/x
  3. Step 3: Cross multiply
    8,468.17x = 11,691.78 × 5,286.31
  4. Step 4: Simplify right side
    8,468.17x = 61,806,373.53
  5. Step 5: Solve for x
    x = 61,806,373.53/8,468.17
  6. Step 6: Final answer
    x = 7,298.67

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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.