Home / 13,721.85-18,936.41-8,414.73

Finding the Fourth Proportional to 13,721.85, 18,936.41 and 8,414.73

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Solution

The fourth proportional to 13,721.85, 18,936.41 and 8,414.73 is: 11,612.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.85 : 18,936.41 = 8,414.73 : x
  2. Step 2: Convert to fraction form
    13,721.85/18,936.41 = 8,414.73/x
  3. Step 3: Cross multiply
    13,721.85x = 18,936.41 × 8,414.73
  4. Step 4: Simplify right side
    13,721.85x = 159,344,735.25
  5. Step 5: Solve for x
    x = 159,344,735.25/13,721.85
  6. Step 6: Final answer
    x = 11,612.48

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1.5x scale

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.