Home / 7,786.13-11,679.89-3,105

Finding the Fourth Proportional to 7,786.13, 11,679.89 and 3,105

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Solution

The fourth proportional to 7,786.13, 11,679.89 and 3,105 is: 4,657.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,786.13 : 11,679.89 = 3,105 : x
  2. Step 2: Convert to fraction form
    7,786.13/11,679.89 = 3,105/x
  3. Step 3: Cross multiply
    7,786.13x = 11,679.89 × 3,105
  4. Step 4: Simplify right side
    7,786.13x = 36,266,042.93
  5. Step 5: Solve for x
    x = 36,266,042.93/7,786.13
  6. Step 6: Final answer
    x = 4,657.78

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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.