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Finding the Fourth Proportional to 8,109.90, 11,191.65 and 4,383.90

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Solution

The fourth proportional to 8,109.90, 11,191.65 and 4,383.90 is: 6,049.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,109.90 : 11,191.65 = 4,383.90 : x
  2. Step 2: Convert to fraction form
    8,109.90/11,191.65 = 4,383.90/x
  3. Step 3: Cross multiply
    8,109.90x = 11,191.65 × 4,383.90
  4. Step 4: Simplify right side
    8,109.90x = 49,063,074.44
  5. Step 5: Solve for x
    x = 49,063,074.44/8,109.90
  6. Step 6: Final answer
    x = 6,049.78

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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.