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Finding the Fourth Proportional to 8,617.72, 12,922.92 and 3,072.46

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Solution

The fourth proportional to 8,617.72, 12,922.92 and 3,072.46 is: 4,607.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,617.72 : 12,922.92 = 3,072.46 : x
  2. Step 2: Convert to fraction form
    8,617.72/12,922.92 = 3,072.46/x
  3. Step 3: Cross multiply
    8,617.72x = 12,922.92 × 3,072.46
  4. Step 4: Simplify right side
    8,617.72x = 39,705,154.78
  5. Step 5: Solve for x
    x = 39,705,154.78/8,617.72
  6. Step 6: Final answer
    x = 4,607.39

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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.