Home / 7,981.66-11,974.11-2,791.18

Finding the Fourth Proportional to 7,981.66, 11,974.11 and 2,791.18

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Solution

The fourth proportional to 7,981.66, 11,974.11 and 2,791.18 is: 4,187.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.66 : 11,974.11 = 2,791.18 : x
  2. Step 2: Convert to fraction form
    7,981.66/11,974.11 = 2,791.18/x
  3. Step 3: Cross multiply
    7,981.66x = 11,974.11 × 2,791.18
  4. Step 4: Simplify right side
    7,981.66x = 33,421,896.35
  5. Step 5: Solve for x
    x = 33,421,896.35/7,981.66
  6. Step 6: Final answer
    x = 4,187.34

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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.