Home / 11,979.72-17,972.31-3,660.92

Finding the Fourth Proportional to 11,979.72, 17,972.31 and 3,660.92

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Solution

The fourth proportional to 11,979.72, 17,972.31 and 3,660.92 is: 5,492.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,979.72 : 17,972.31 = 3,660.92 : x
  2. Step 2: Convert to fraction form
    11,979.72/17,972.31 = 3,660.92/x
  3. Step 3: Cross multiply
    11,979.72x = 17,972.31 × 3,660.92
  4. Step 4: Simplify right side
    11,979.72x = 65,795,180.39
  5. Step 5: Solve for x
    x = 65,795,180.39/11,979.72
  6. Step 6: Final answer
    x = 5,492.21

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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.