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Finding the Fourth Proportional to 8,456.76, 12,686.62 and 2,910.68

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Solution

The fourth proportional to 8,456.76, 12,686.62 and 2,910.68 is: 4,366.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,456.76 : 12,686.62 = 2,910.68 : x
  2. Step 2: Convert to fraction form
    8,456.76/12,686.62 = 2,910.68/x
  3. Step 3: Cross multiply
    8,456.76x = 12,686.62 × 2,910.68
  4. Step 4: Simplify right side
    8,456.76x = 36,926,691.10
  5. Step 5: Solve for x
    x = 36,926,691.10/8,456.76
  6. Step 6: Final answer
    x = 4,366.53

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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.