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Finding the Fourth Proportional to 8,185.35, 12,209.17 and 7,939.38

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Solution

The fourth proportional to 8,185.35, 12,209.17 and 7,939.38 is: 11,842.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,185.35 : 12,209.17 = 7,939.38 : x
  2. Step 2: Convert to fraction form
    8,185.35/12,209.17 = 7,939.38/x
  3. Step 3: Cross multiply
    8,185.35x = 12,209.17 × 7,939.38
  4. Step 4: Simplify right side
    8,185.35x = 96,933,310.71
  5. Step 5: Solve for x
    x = 96,933,310.71/8,185.35
  6. Step 6: Final answer
    x = 11,842.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.