Home / 26,121.89-39,128.62-12,754.54

Finding the Fourth Proportional to 26,121.89, 39,128.62 and 12,754.54

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Solution

The fourth proportional to 26,121.89, 39,128.62 and 12,754.54 is: 19,105.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,121.89 : 39,128.62 = 12,754.54 : x
  2. Step 2: Convert to fraction form
    26,121.89/39,128.62 = 12,754.54/x
  3. Step 3: Cross multiply
    26,121.89x = 39,128.62 × 12,754.54
  4. Step 4: Simplify right side
    26,121.89x = 499,067,479.82
  5. Step 5: Solve for x
    x = 499,067,479.82/26,121.89
  6. Step 6: Final answer
    x = 19,105.33

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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.