Home / 5,190.75-7,787.21-2,112.75

Finding the Fourth Proportional to 5,190.75, 7,787.21 and 2,112.75

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Solution

The fourth proportional to 5,190.75, 7,787.21 and 2,112.75 is: 3,169.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,190.75 : 7,787.21 = 2,112.75 : x
  2. Step 2: Convert to fraction form
    5,190.75/7,787.21 = 2,112.75/x
  3. Step 3: Cross multiply
    5,190.75x = 7,787.21 × 2,112.75
  4. Step 4: Simplify right side
    5,190.75x = 16,452,417.36
  5. Step 5: Solve for x
    x = 16,452,417.36/5,190.75
  6. Step 6: Final answer
    x = 3,169.56

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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.