Home / 7,986.18-11,981.28-2,439.30

Finding the Fourth Proportional to 7,986.18, 11,981.28 and 2,439.30

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Solution

The fourth proportional to 7,986.18, 11,981.28 and 2,439.30 is: 3,659.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,986.18 : 11,981.28 = 2,439.30 : x
  2. Step 2: Convert to fraction form
    7,986.18/11,981.28 = 2,439.30/x
  3. Step 3: Cross multiply
    7,986.18x = 11,981.28 × 2,439.30
  4. Step 4: Simplify right side
    7,986.18x = 29,225,936.30
  5. Step 5: Solve for x
    x = 29,225,936.30/7,986.18
  6. Step 6: Final answer
    x = 3,659.56

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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.