Home / 7,983.69-11,976.15-2,139.54

Finding the Fourth Proportional to 7,983.69, 11,976.15 and 2,139.54

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Solution

The fourth proportional to 7,983.69, 11,976.15 and 2,139.54 is: 3,209.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,983.69 : 11,976.15 = 2,139.54 : x
  2. Step 2: Convert to fraction form
    7,983.69/11,976.15 = 2,139.54/x
  3. Step 3: Cross multiply
    7,983.69x = 11,976.15 × 2,139.54
  4. Step 4: Simplify right side
    7,983.69x = 25,623,451.97
  5. Step 5: Solve for x
    x = 25,623,451.97/7,983.69
  6. Step 6: Final answer
    x = 3,209.47

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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.