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Finding the Fourth Proportional to 8,456.92, 12,685 and 2,216.79

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Solution

The fourth proportional to 8,456.92, 12,685 and 2,216.79 is: 3,325.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,456.92 : 12,685 = 2,216.79 : x
  2. Step 2: Convert to fraction form
    8,456.92/12,685 = 2,216.79/x
  3. Step 3: Cross multiply
    8,456.92x = 12,685 × 2,216.79
  4. Step 4: Simplify right side
    8,456.92x = 28,119,981.15
  5. Step 5: Solve for x
    x = 28,119,981.15/8,456.92
  6. Step 6: Final answer
    x = 3,325.09

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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.