Home / 7,986.52-11,979.78-2,791.18

Finding the Fourth Proportional to 7,986.52, 11,979.78 and 2,791.18

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Solution

The fourth proportional to 7,986.52, 11,979.78 and 2,791.18 is: 4,186.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,986.52 : 11,979.78 = 2,791.18 : x
  2. Step 2: Convert to fraction form
    7,986.52/11,979.78 = 2,791.18/x
  3. Step 3: Cross multiply
    7,986.52x = 11,979.78 × 2,791.18
  4. Step 4: Simplify right side
    7,986.52x = 33,437,722.34
  5. Step 5: Solve for x
    x = 33,437,722.34/7,986.52
  6. Step 6: Final answer
    x = 4,186.77

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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.