Home / 7,985.91-11,979.02-2,791.79

Finding the Fourth Proportional to 7,985.91, 11,979.02 and 2,791.79

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Solution

The fourth proportional to 7,985.91, 11,979.02 and 2,791.79 is: 4,187.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.91 : 11,979.02 = 2,791.79 : x
  2. Step 2: Convert to fraction form
    7,985.91/11,979.02 = 2,791.79/x
  3. Step 3: Cross multiply
    7,985.91x = 11,979.02 × 2,791.79
  4. Step 4: Simplify right side
    7,985.91x = 33,442,834.39
  5. Step 5: Solve for x
    x = 33,442,834.39/7,985.91
  6. Step 6: Final answer
    x = 4,187.73

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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.