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Finding the Fourth Proportional to 8,479.66, 12,706.94 and 8,005.76

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Solution

The fourth proportional to 8,479.66, 12,706.94 and 8,005.76 is: 11,996.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,479.66 : 12,706.94 = 8,005.76 : x
  2. Step 2: Convert to fraction form
    8,479.66/12,706.94 = 8,005.76/x
  3. Step 3: Cross multiply
    8,479.66x = 12,706.94 × 8,005.76
  4. Step 4: Simplify right side
    8,479.66x = 101,728,711.97
  5. Step 5: Solve for x
    x = 101,728,711.97/8,479.66
  6. Step 6: Final answer
    x = 11,996.79

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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.