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Finding the Fourth Proportional to 8,660.34, 12,991.14 and 2,959.02

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Solution

The fourth proportional to 8,660.34, 12,991.14 and 2,959.02 is: 4,438.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.34 : 12,991.14 = 2,959.02 : x
  2. Step 2: Convert to fraction form
    8,660.34/12,991.14 = 2,959.02/x
  3. Step 3: Cross multiply
    8,660.34x = 12,991.14 × 2,959.02
  4. Step 4: Simplify right side
    8,660.34x = 38,441,043.08
  5. Step 5: Solve for x
    x = 38,441,043.08/8,660.34
  6. Step 6: Final answer
    x = 4,438.75

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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.