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Finding the Fourth Proportional to 6,399.38, 8,831.13 and 3,604.86

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Solution

The fourth proportional to 6,399.38, 8,831.13 and 3,604.86 is: 4,974.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,399.38 : 8,831.13 = 3,604.86 : x
  2. Step 2: Convert to fraction form
    6,399.38/8,831.13 = 3,604.86/x
  3. Step 3: Cross multiply
    6,399.38x = 8,831.13 × 3,604.86
  4. Step 4: Simplify right side
    6,399.38x = 31,834,987.29
  5. Step 5: Solve for x
    x = 31,834,987.29/6,399.38
  6. Step 6: Final answer
    x = 4,974.70

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1.5x scale

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.