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Finding the Fourth Proportional to 8,191.30, 12,286.90 and 2,347.92

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Solution

The fourth proportional to 8,191.30, 12,286.90 and 2,347.92 is: 3,521.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,191.30 : 12,286.90 = 2,347.92 : x
  2. Step 2: Convert to fraction form
    8,191.30/12,286.90 = 2,347.92/x
  3. Step 3: Cross multiply
    8,191.30x = 12,286.90 × 2,347.92
  4. Step 4: Simplify right side
    8,191.30x = 28,848,658.25
  5. Step 5: Solve for x
    x = 28,848,658.25/8,191.30
  6. Step 6: Final answer
    x = 3,521.87

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1.5x scale

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.