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Finding the Fourth Proportional to 8,394.30, 12,591.45 and 5,475.90

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Solution

The fourth proportional to 8,394.30, 12,591.45 and 5,475.90 is: 8,213.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,394.30 : 12,591.45 = 5,475.90 : x
  2. Step 2: Convert to fraction form
    8,394.30/12,591.45 = 5,475.90/x
  3. Step 3: Cross multiply
    8,394.30x = 12,591.45 × 5,475.90
  4. Step 4: Simplify right side
    8,394.30x = 68,949,521.06
  5. Step 5: Solve for x
    x = 68,949,521.06/8,394.30
  6. Step 6: Final answer
    x = 8,213.85

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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.