Home / 13,647.78-20,469.21-3,787.85

Finding the Fourth Proportional to 13,647.78, 20,469.21 and 3,787.85

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Solution

The fourth proportional to 13,647.78, 20,469.21 and 3,787.85 is: 5,681.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,647.78 : 20,469.21 = 3,787.85 : x
  2. Step 2: Convert to fraction form
    13,647.78/20,469.21 = 3,787.85/x
  3. Step 3: Cross multiply
    13,647.78x = 20,469.21 × 3,787.85
  4. Step 4: Simplify right side
    13,647.78x = 77,534,278.16
  5. Step 5: Solve for x
    x = 77,534,278.16/13,647.78
  6. Step 6: Final answer
    x = 5,681.09

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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.