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Finding the Fourth Proportional to 11,993.87, 17,991.72 and 3,228.86

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Solution

The fourth proportional to 11,993.87, 17,991.72 and 3,228.86 is: 4,843.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,993.87 : 17,991.72 = 3,228.86 : x
  2. Step 2: Convert to fraction form
    11,993.87/17,991.72 = 3,228.86/x
  3. Step 3: Cross multiply
    11,993.87x = 17,991.72 × 3,228.86
  4. Step 4: Simplify right side
    11,993.87x = 58,092,790.02
  5. Step 5: Solve for x
    x = 58,092,790.02/11,993.87
  6. Step 6: Final answer
    x = 4,843.54

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1.5x scale

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.