Home / 11,986.13-17,979.18-3,221.04

Finding the Fourth Proportional to 11,986.13, 17,979.18 and 3,221.04

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Solution

The fourth proportional to 11,986.13, 17,979.18 and 3,221.04 is: 4,831.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,986.13 : 17,979.18 = 3,221.04 : x
  2. Step 2: Convert to fraction form
    11,986.13/17,979.18 = 3,221.04/x
  3. Step 3: Cross multiply
    11,986.13x = 17,979.18 × 3,221.04
  4. Step 4: Simplify right side
    11,986.13x = 57,911,657.95
  5. Step 5: Solve for x
    x = 57,911,657.95/11,986.13
  6. Step 6: Final answer
    x = 4,831.56

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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.