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Finding the Fourth Proportional to 6,685.56, 9,227.16 and 6,390.27

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Solution

The fourth proportional to 6,685.56, 9,227.16 and 6,390.27 is: 8,819.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,685.56 : 9,227.16 = 6,390.27 : x
  2. Step 2: Convert to fraction form
    6,685.56/9,227.16 = 6,390.27/x
  3. Step 3: Cross multiply
    6,685.56x = 9,227.16 × 6,390.27
  4. Step 4: Simplify right side
    6,685.56x = 58,964,043.73
  5. Step 5: Solve for x
    x = 58,964,043.73/6,685.56
  6. Step 6: Final answer
    x = 8,819.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.