Home / 2,768.72-3,821.84-2,181.88

Finding the Fourth Proportional to 2,768.72, 3,821.84 and 2,181.88

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Solution

The fourth proportional to 2,768.72, 3,821.84 and 2,181.88 is: 3,011.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.72 : 3,821.84 = 2,181.88 : x
  2. Step 2: Convert to fraction form
    2,768.72/3,821.84 = 2,181.88/x
  3. Step 3: Cross multiply
    2,768.72x = 3,821.84 × 2,181.88
  4. Step 4: Simplify right side
    2,768.72x = 8,338,796.26
  5. Step 5: Solve for x
    x = 8,338,796.26/2,768.72
  6. Step 6: Final answer
    x = 3,011.79

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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.