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Finding the Fourth Proportional to 8,478.96, 12,711.20 and 4,578.96

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Solution

The fourth proportional to 8,478.96, 12,711.20 and 4,578.96 is: 6,864.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.96 : 12,711.20 = 4,578.96 : x
  2. Step 2: Convert to fraction form
    8,478.96/12,711.20 = 4,578.96/x
  3. Step 3: Cross multiply
    8,478.96x = 12,711.20 × 4,578.96
  4. Step 4: Simplify right side
    8,478.96x = 58,204,076.35
  5. Step 5: Solve for x
    x = 58,204,076.35/8,478.96
  6. Step 6: Final answer
    x = 6,864.53

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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.