Home / 7,981.46-11,972.19-2,137.92

Finding the Fourth Proportional to 7,981.46, 11,972.19 and 2,137.92

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Solution

The fourth proportional to 7,981.46, 11,972.19 and 2,137.92 is: 3,206.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.46 : 11,972.19 = 2,137.92 : x
  2. Step 2: Convert to fraction form
    7,981.46/11,972.19 = 2,137.92/x
  3. Step 3: Cross multiply
    7,981.46x = 11,972.19 × 2,137.92
  4. Step 4: Simplify right side
    7,981.46x = 25,595,584.44
  5. Step 5: Solve for x
    x = 25,595,584.44/7,981.46
  6. Step 6: Final answer
    x = 3,206.88

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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.