Home / 8,105.09-12,159.32-3,425.11

Finding the Fourth Proportional to 8,105.09, 12,159.32 and 3,425.11

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Solution

The fourth proportional to 8,105.09, 12,159.32 and 3,425.11 is: 5,138.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,105.09 : 12,159.32 = 3,425.11 : x
  2. Step 2: Convert to fraction form
    8,105.09/12,159.32 = 3,425.11/x
  3. Step 3: Cross multiply
    8,105.09x = 12,159.32 × 3,425.11
  4. Step 4: Simplify right side
    8,105.09x = 41,647,008.53
  5. Step 5: Solve for x
    x = 41,647,008.53/8,105.09
  6. Step 6: Final answer
    x = 5,138.38

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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.