Home / 20,115.51-27,759.62-11,163.85

Finding the Fourth Proportional to 20,115.51, 27,759.62 and 11,163.85

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Solution

The fourth proportional to 20,115.51, 27,759.62 and 11,163.85 is: 15,406.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.51 : 27,759.62 = 11,163.85 : x
  2. Step 2: Convert to fraction form
    20,115.51/27,759.62 = 11,163.85/x
  3. Step 3: Cross multiply
    20,115.51x = 27,759.62 × 11,163.85
  4. Step 4: Simplify right side
    20,115.51x = 309,904,233.74
  5. Step 5: Solve for x
    x = 309,904,233.74/20,115.51
  6. Step 6: Final answer
    x = 15,406.23

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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.