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Finding the Fourth Proportional to 18,661.26, 25,745.04 and 11,107.89

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Solution

The fourth proportional to 18,661.26, 25,745.04 and 11,107.89 is: 15,324.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.26 : 25,745.04 = 11,107.89 : x
  2. Step 2: Convert to fraction form
    18,661.26/25,745.04 = 11,107.89/x
  3. Step 3: Cross multiply
    18,661.26x = 25,745.04 × 11,107.89
  4. Step 4: Simplify right side
    18,661.26x = 285,973,072.37
  5. Step 5: Solve for x
    x = 285,973,072.37/18,661.26
  6. Step 6: Final answer
    x = 15,324.42

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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.