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Finding the Fourth Proportional to 6,479.64, 9,711.18 and 4,138.74

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Solution

The fourth proportional to 6,479.64, 9,711.18 and 4,138.74 is: 6,202.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,479.64 : 9,711.18 = 4,138.74 : x
  2. Step 2: Convert to fraction form
    6,479.64/9,711.18 = 4,138.74/x
  3. Step 3: Cross multiply
    6,479.64x = 9,711.18 × 4,138.74
  4. Step 4: Simplify right side
    6,479.64x = 40,192,049.11
  5. Step 5: Solve for x
    x = 40,192,049.11/6,479.64
  6. Step 6: Final answer
    x = 6,202.82

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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.