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Finding the Fourth Proportional to 8,634.11, 11,920.16 and 8,135.89

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Solution

The fourth proportional to 8,634.11, 11,920.16 and 8,135.89 is: 11,232.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,634.11 : 11,920.16 = 8,135.89 : x
  2. Step 2: Convert to fraction form
    8,634.11/11,920.16 = 8,135.89/x
  3. Step 3: Cross multiply
    8,634.11x = 11,920.16 × 8,135.89
  4. Step 4: Simplify right side
    8,634.11x = 96,981,110.54
  5. Step 5: Solve for x
    x = 96,981,110.54/8,634.11
  6. Step 6: Final answer
    x = 11,232.32

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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.