Home / 3,571.56-5,357.30-1,991.28

Finding the Fourth Proportional to 3,571.56, 5,357.30 and 1,991.28

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Solution

The fourth proportional to 3,571.56, 5,357.30 and 1,991.28 is: 2,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,571.56 : 5,357.30 = 1,991.28 : x
  2. Step 2: Convert to fraction form
    3,571.56/5,357.30 = 1,991.28/x
  3. Step 3: Cross multiply
    3,571.56x = 5,357.30 × 1,991.28
  4. Step 4: Simplify right side
    3,571.56x = 10,667,884.34
  5. Step 5: Solve for x
    x = 10,667,884.34/3,571.56
  6. Step 6: Final answer
    x = 2,986.90

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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.