Home / 7,983.31-11,974.97-2,139.76

Finding the Fourth Proportional to 7,983.31, 11,974.97 and 2,139.76

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Solution

The fourth proportional to 7,983.31, 11,974.97 and 2,139.76 is: 3,209.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,983.31 : 11,974.97 = 2,139.76 : x
  2. Step 2: Convert to fraction form
    7,983.31/11,974.97 = 2,139.76/x
  3. Step 3: Cross multiply
    7,983.31x = 11,974.97 × 2,139.76
  4. Step 4: Simplify right side
    7,983.31x = 25,623,561.81
  5. Step 5: Solve for x
    x = 25,623,561.81/7,983.31
  6. Step 6: Final answer
    x = 3,209.64

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Similar ratio
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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.