Home / 10,831.20-14,947.03-6,115.78

Finding the Fourth Proportional to 10,831.20, 14,947.03 and 6,115.78

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Solution

The fourth proportional to 10,831.20, 14,947.03 and 6,115.78 is: 8,439.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,831.20 : 14,947.03 = 6,115.78 : x
  2. Step 2: Convert to fraction form
    10,831.20/14,947.03 = 6,115.78/x
  3. Step 3: Cross multiply
    10,831.20x = 14,947.03 × 6,115.78
  4. Step 4: Simplify right side
    10,831.20x = 91,412,747.13
  5. Step 5: Solve for x
    x = 91,412,747.13/10,831.20
  6. Step 6: Final answer
    x = 8,439.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.