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Finding the Fourth Proportional to 3,963.86, 5,470.07 and 2,171.31

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Solution

The fourth proportional to 3,963.86, 5,470.07 and 2,171.31 is: 2,996.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,963.86 : 5,470.07 = 2,171.31 : x
  2. Step 2: Convert to fraction form
    3,963.86/5,470.07 = 2,171.31/x
  3. Step 3: Cross multiply
    3,963.86x = 5,470.07 × 2,171.31
  4. Step 4: Simplify right side
    3,963.86x = 11,877,206.84
  5. Step 5: Solve for x
    x = 11,877,206.84/3,963.86
  6. Step 6: Final answer
    x = 2,996.38

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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.