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Finding the Fourth Proportional to 8,456.67, 12,687.84 and 2,913.84

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Solution

The fourth proportional to 8,456.67, 12,687.84 and 2,913.84 is: 4,371.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,456.67 : 12,687.84 = 2,913.84 : x
  2. Step 2: Convert to fraction form
    8,456.67/12,687.84 = 2,913.84/x
  3. Step 3: Cross multiply
    8,456.67x = 12,687.84 × 2,913.84
  4. Step 4: Simplify right side
    8,456.67x = 36,970,335.71
  5. Step 5: Solve for x
    x = 36,970,335.71/8,456.67
  6. Step 6: Final answer
    x = 4,371.74

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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.