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Finding the Fourth Proportional to 8,479.88, 12,721.98 and 3,287.24

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Solution

The fourth proportional to 8,479.88, 12,721.98 and 3,287.24 is: 4,931.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,479.88 : 12,721.98 = 3,287.24 : x
  2. Step 2: Convert to fraction form
    8,479.88/12,721.98 = 3,287.24/x
  3. Step 3: Cross multiply
    8,479.88x = 12,721.98 × 3,287.24
  4. Step 4: Simplify right side
    8,479.88x = 41,820,201.54
  5. Step 5: Solve for x
    x = 41,820,201.54/8,479.88
  6. Step 6: Final answer
    x = 4,931.70

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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.