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Finding the Fourth Proportional to 8,321.90, 12,481.49 and 2,775.29

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Solution

The fourth proportional to 8,321.90, 12,481.49 and 2,775.29 is: 4,162.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.90 : 12,481.49 = 2,775.29 : x
  2. Step 2: Convert to fraction form
    8,321.90/12,481.49 = 2,775.29/x
  3. Step 3: Cross multiply
    8,321.90x = 12,481.49 × 2,775.29
  4. Step 4: Simplify right side
    8,321.90x = 34,639,678.10
  5. Step 5: Solve for x
    x = 34,639,678.10/8,321.90
  6. Step 6: Final answer
    x = 4,162.47

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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.