Home / 7,986.38-11,981.02-2,721.12

Finding the Fourth Proportional to 7,986.38, 11,981.02 and 2,721.12

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Solution

The fourth proportional to 7,986.38, 11,981.02 and 2,721.12 is: 4,082.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,986.38 : 11,981.02 = 2,721.12 : x
  2. Step 2: Convert to fraction form
    7,986.38/11,981.02 = 2,721.12/x
  3. Step 3: Cross multiply
    7,986.38x = 11,981.02 × 2,721.12
  4. Step 4: Simplify right side
    7,986.38x = 32,601,793.14
  5. Step 5: Solve for x
    x = 32,601,793.14/7,986.38
  6. Step 6: Final answer
    x = 4,082.17

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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.