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Finding the Fourth Proportional to 8,665.92, 12,997.64 and 3,118.46

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Solution

The fourth proportional to 8,665.92, 12,997.64 and 3,118.46 is: 4,677.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.92 : 12,997.64 = 3,118.46 : x
  2. Step 2: Convert to fraction form
    8,665.92/12,997.64 = 3,118.46/x
  3. Step 3: Cross multiply
    8,665.92x = 12,997.64 × 3,118.46
  4. Step 4: Simplify right side
    8,665.92x = 40,532,620.43
  5. Step 5: Solve for x
    x = 40,532,620.43/8,665.92
  6. Step 6: Final answer
    x = 4,677.24

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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.