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Finding the Fourth Proportional to 8,661.56, 12,992.52 and 3,322.85

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Solution

The fourth proportional to 8,661.56, 12,992.52 and 3,322.85 is: 4,984.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.56 : 12,992.52 = 3,322.85 : x
  2. Step 2: Convert to fraction form
    8,661.56/12,992.52 = 3,322.85/x
  3. Step 3: Cross multiply
    8,661.56x = 12,992.52 × 3,322.85
  4. Step 4: Simplify right side
    8,661.56x = 43,172,195.08
  5. Step 5: Solve for x
    x = 43,172,195.08/8,661.56
  6. Step 6: Final answer
    x = 4,984.34

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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.