Home / 11,987.75-17,979.18-3,222.74

Finding the Fourth Proportional to 11,987.75, 17,979.18 and 3,222.74

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Solution

The fourth proportional to 11,987.75, 17,979.18 and 3,222.74 is: 4,833.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,987.75 : 17,979.18 = 3,222.74 : x
  2. Step 2: Convert to fraction form
    11,987.75/17,979.18 = 3,222.74/x
  3. Step 3: Cross multiply
    11,987.75x = 17,979.18 × 3,222.74
  4. Step 4: Simplify right side
    11,987.75x = 57,942,132.66
  5. Step 5: Solve for x
    x = 57,942,132.66/11,987.75
  6. Step 6: Final answer
    x = 4,833.45

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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.