Home / 11,986.20-17,979.38-3,666.36

Finding the Fourth Proportional to 11,986.20, 17,979.38 and 3,666.36

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Solution

The fourth proportional to 11,986.20, 17,979.38 and 3,666.36 is: 5,499.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,986.20 : 17,979.38 = 3,666.36 : x
  2. Step 2: Convert to fraction form
    11,986.20/17,979.38 = 3,666.36/x
  3. Step 3: Cross multiply
    11,986.20x = 17,979.38 × 3,666.36
  4. Step 4: Simplify right side
    11,986.20x = 65,918,879.66
  5. Step 5: Solve for x
    x = 65,918,879.66/11,986.20
  6. Step 6: Final answer
    x = 5,499.56

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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.