Home / 5,128.75-7,687.62-2,662.96

Finding the Fourth Proportional to 5,128.75, 7,687.62 and 2,662.96

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Solution

The fourth proportional to 5,128.75, 7,687.62 and 2,662.96 is: 3,991.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.75 : 7,687.62 = 2,662.96 : x
  2. Step 2: Convert to fraction form
    5,128.75/7,687.62 = 2,662.96/x
  3. Step 3: Cross multiply
    5,128.75x = 7,687.62 × 2,662.96
  4. Step 4: Simplify right side
    5,128.75x = 20,471,824.56
  5. Step 5: Solve for x
    x = 20,471,824.56/5,128.75
  6. Step 6: Final answer
    x = 3,991.58

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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.