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Finding the Fourth Proportional to 8,660.97, 12,989.59 and 2,738.32

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Solution

The fourth proportional to 8,660.97, 12,989.59 and 2,738.32 is: 4,106.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.97 : 12,989.59 = 2,738.32 : x
  2. Step 2: Convert to fraction form
    8,660.97/12,989.59 = 2,738.32/x
  3. Step 3: Cross multiply
    8,660.97x = 12,989.59 × 2,738.32
  4. Step 4: Simplify right side
    8,660.97x = 35,569,654.09
  5. Step 5: Solve for x
    x = 35,569,654.09/8,660.97
  6. Step 6: Final answer
    x = 4,106.89

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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.