Home / 11,991.16-17,979.78-3,668.80

Finding the Fourth Proportional to 11,991.16, 17,979.78 and 3,668.80

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Solution

The fourth proportional to 11,991.16, 17,979.78 and 3,668.80 is: 5,501.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,991.16 : 17,979.78 = 3,668.80 : x
  2. Step 2: Convert to fraction form
    11,991.16/17,979.78 = 3,668.80/x
  3. Step 3: Cross multiply
    11,991.16x = 17,979.78 × 3,668.80
  4. Step 4: Simplify right side
    11,991.16x = 65,964,216.86
  5. Step 5: Solve for x
    x = 65,964,216.86/11,991.16
  6. Step 6: Final answer
    x = 5,501.07

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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.