Home / 2,811.24-3,878.28-2,181.96

Finding the Fourth Proportional to 2,811.24, 3,878.28 and 2,181.96

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Solution

The fourth proportional to 2,811.24, 3,878.28 and 2,181.96 is: 3,010.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.24 : 3,878.28 = 2,181.96 : x
  2. Step 2: Convert to fraction form
    2,811.24/3,878.28 = 2,181.96/x
  3. Step 3: Cross multiply
    2,811.24x = 3,878.28 × 2,181.96
  4. Step 4: Simplify right side
    2,811.24x = 8,462,251.83
  5. Step 5: Solve for x
    x = 8,462,251.83/2,811.24
  6. Step 6: Final answer
    x = 3,010.15

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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.