Home / 5,790.87-7,991.19-3,138.22

Finding the Fourth Proportional to 5,790.87, 7,991.19 and 3,138.22

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Solution

The fourth proportional to 5,790.87, 7,991.19 and 3,138.22 is: 4,330.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,790.87 : 7,991.19 = 3,138.22 : x
  2. Step 2: Convert to fraction form
    5,790.87/7,991.19 = 3,138.22/x
  3. Step 3: Cross multiply
    5,790.87x = 7,991.19 × 3,138.22
  4. Step 4: Simplify right side
    5,790.87x = 25,078,112.28
  5. Step 5: Solve for x
    x = 25,078,112.28/5,790.87
  6. Step 6: Final answer
    x = 4,330.63

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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.