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Finding the Fourth Proportional to 6,400.70, 8,831.12 and 4,165.86

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Solution

The fourth proportional to 6,400.70, 8,831.12 and 4,165.86 is: 5,747.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,400.70 : 8,831.12 = 4,165.86 : x
  2. Step 2: Convert to fraction form
    6,400.70/8,831.12 = 4,165.86/x
  3. Step 3: Cross multiply
    6,400.70x = 8,831.12 × 4,165.86
  4. Step 4: Simplify right side
    6,400.70x = 36,789,165.41
  5. Step 5: Solve for x
    x = 36,789,165.41/6,400.70
  6. Step 6: Final answer
    x = 5,747.68

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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.