Home / 3,905.74-5,387.20-2,787.94

Finding the Fourth Proportional to 3,905.74, 5,387.20 and 2,787.94

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Solution

The fourth proportional to 3,905.74, 5,387.20 and 2,787.94 is: 3,845.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.74 : 5,387.20 = 2,787.94 : x
  2. Step 2: Convert to fraction form
    3,905.74/5,387.20 = 2,787.94/x
  3. Step 3: Cross multiply
    3,905.74x = 5,387.20 × 2,787.94
  4. Step 4: Simplify right side
    3,905.74x = 15,019,190.37
  5. Step 5: Solve for x
    x = 15,019,190.37/3,905.74
  6. Step 6: Final answer
    x = 3,845.41

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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.