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Finding the Fourth Proportional to 8,660.25, 12,991.05 and 3,114.32

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Solution

The fourth proportional to 8,660.25, 12,991.05 and 3,114.32 is: 4,671.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.25 : 12,991.05 = 3,114.32 : x
  2. Step 2: Convert to fraction form
    8,660.25/12,991.05 = 3,114.32/x
  3. Step 3: Cross multiply
    8,660.25x = 12,991.05 × 3,114.32
  4. Step 4: Simplify right side
    8,660.25x = 40,458,221.88
  5. Step 5: Solve for x
    x = 40,458,221.88/8,660.25
  6. Step 6: Final answer
    x = 4,671.72

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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.