Home / 3,881.80-5,825.40-2,787.09

Finding the Fourth Proportional to 3,881.80, 5,825.40 and 2,787.09

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Solution

The fourth proportional to 3,881.80, 5,825.40 and 2,787.09 is: 4,182.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.80 : 5,825.40 = 2,787.09 : x
  2. Step 2: Convert to fraction form
    3,881.80/5,825.40 = 2,787.09/x
  3. Step 3: Cross multiply
    3,881.80x = 5,825.40 × 2,787.09
  4. Step 4: Simplify right side
    3,881.80x = 16,235,914.09
  5. Step 5: Solve for x
    x = 16,235,914.09/3,881.80
  6. Step 6: Final answer
    x = 4,182.57

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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.