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Finding the Fourth Proportional to 8,694.80, 13,042.20 and 5,414.30

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Solution

The fourth proportional to 8,694.80, 13,042.20 and 5,414.30 is: 8,121.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,694.80 : 13,042.20 = 5,414.30 : x
  2. Step 2: Convert to fraction form
    8,694.80/13,042.20 = 5,414.30/x
  3. Step 3: Cross multiply
    8,694.80x = 13,042.20 × 5,414.30
  4. Step 4: Simplify right side
    8,694.80x = 70,614,383.46
  5. Step 5: Solve for x
    x = 70,614,383.46/8,694.80
  6. Step 6: Final answer
    x = 8,121.45

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1.5x scale

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.