Home / 2,811.72-4,214.88-2,571.12

Finding the Fourth Proportional to 2,811.72, 4,214.88 and 2,571.12

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Solution

The fourth proportional to 2,811.72, 4,214.88 and 2,571.12 is: 3,854.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.72 : 4,214.88 = 2,571.12 : x
  2. Step 2: Convert to fraction form
    2,811.72/4,214.88 = 2,571.12/x
  3. Step 3: Cross multiply
    2,811.72x = 4,214.88 × 2,571.12
  4. Step 4: Simplify right side
    2,811.72x = 10,836,962.27
  5. Step 5: Solve for x
    x = 10,836,962.27/2,811.72
  6. Step 6: Final answer
    x = 3,854.21

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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.