Home / 2,811.12-3,880.43-2,515.87

Finding the Fourth Proportional to 2,811.12, 3,880.43 and 2,515.87

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Solution

The fourth proportional to 2,811.12, 3,880.43 and 2,515.87 is: 3,472.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.12 : 3,880.43 = 2,515.87 : x
  2. Step 2: Convert to fraction form
    2,811.12/3,880.43 = 2,515.87/x
  3. Step 3: Cross multiply
    2,811.12x = 3,880.43 × 2,515.87
  4. Step 4: Simplify right side
    2,811.12x = 9,762,657.42
  5. Step 5: Solve for x
    x = 9,762,657.42/2,811.12
  6. Step 6: Final answer
    x = 3,472.88

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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.