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Finding the Fourth Proportional to 8,694.80, 13,042.21 and 2,120.95

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Solution

The fourth proportional to 8,694.80, 13,042.21 and 2,120.95 is: 3,181.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,694.80 : 13,042.21 = 2,120.95 : x
  2. Step 2: Convert to fraction form
    8,694.80/13,042.21 = 2,120.95/x
  3. Step 3: Cross multiply
    8,694.80x = 13,042.21 × 2,120.95
  4. Step 4: Simplify right side
    8,694.80x = 27,661,875.30
  5. Step 5: Solve for x
    x = 27,661,875.30/8,694.80
  6. Step 6: Final answer
    x = 3,181.43

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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.