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Finding the Fourth Proportional to 8,478.58, 12,712.87 and 3,479.46

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Solution

The fourth proportional to 8,478.58, 12,712.87 and 3,479.46 is: 5,217.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.58 : 12,712.87 = 3,479.46 : x
  2. Step 2: Convert to fraction form
    8,478.58/12,712.87 = 3,479.46/x
  3. Step 3: Cross multiply
    8,478.58x = 12,712.87 × 3,479.46
  4. Step 4: Simplify right side
    8,478.58x = 44,233,882.17
  5. Step 5: Solve for x
    x = 44,233,882.17/8,478.58
  6. Step 6: Final answer
    x = 5,217.14

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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.