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Finding the Fourth Proportional to 9,744.80, 14,620.80 and 3,171.20

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Solution

The fourth proportional to 9,744.80, 14,620.80 and 3,171.20 is: 4,757.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,744.80 : 14,620.80 = 3,171.20 : x
  2. Step 2: Convert to fraction form
    9,744.80/14,620.80 = 3,171.20/x
  3. Step 3: Cross multiply
    9,744.80x = 14,620.80 × 3,171.20
  4. Step 4: Simplify right side
    9,744.80x = 46,365,480.96
  5. Step 5: Solve for x
    x = 46,365,480.96/9,744.80
  6. Step 6: Final answer
    x = 4,757.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.