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Finding the Fourth Proportional to 6,399.71, 8,831.43 and 3,567.09

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Solution

The fourth proportional to 6,399.71, 8,831.43 and 3,567.09 is: 4,922.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,399.71 : 8,831.43 = 3,567.09 : x
  2. Step 2: Convert to fraction form
    6,399.71/8,831.43 = 3,567.09/x
  3. Step 3: Cross multiply
    6,399.71x = 8,831.43 × 3,567.09
  4. Step 4: Simplify right side
    6,399.71x = 31,502,505.64
  5. Step 5: Solve for x
    x = 31,502,505.64/6,399.71
  6. Step 6: Final answer
    x = 4,922.49

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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.