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Finding the Fourth Proportional to 18,480.78, 27,745.82 and 15,725.16

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Solution

The fourth proportional to 18,480.78, 27,745.82 and 15,725.16 is: 23,608.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,480.78 : 27,745.82 = 15,725.16 : x
  2. Step 2: Convert to fraction form
    18,480.78/27,745.82 = 15,725.16/x
  3. Step 3: Cross multiply
    18,480.78x = 27,745.82 × 15,725.16
  4. Step 4: Simplify right side
    18,480.78x = 436,307,380.21
  5. Step 5: Solve for x
    x = 436,307,380.21/18,480.78
  6. Step 6: Final answer
    x = 23,608.71

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1.5x scale

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.