Home / 20,115.15-27,759.21-11,163.23

Finding the Fourth Proportional to 20,115.15, 27,759.21 and 11,163.23

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Solution

The fourth proportional to 20,115.15, 27,759.21 and 11,163.23 is: 15,405.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.15 : 27,759.21 = 11,163.23 : x
  2. Step 2: Convert to fraction form
    20,115.15/27,759.21 = 11,163.23/x
  3. Step 3: Cross multiply
    20,115.15x = 27,759.21 × 11,163.23
  4. Step 4: Simplify right side
    20,115.15x = 309,882,369.29
  5. Step 5: Solve for x
    x = 309,882,369.29/20,115.15
  6. Step 6: Final answer
    x = 15,405.42

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Half scale
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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.