Home / 20,115.36-27,758.78-11,162.79

Finding the Fourth Proportional to 20,115.36, 27,758.78 and 11,162.79

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Solution

The fourth proportional to 20,115.36, 27,758.78 and 11,162.79 is: 15,404.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.36 : 27,758.78 = 11,162.79 : x
  2. Step 2: Convert to fraction form
    20,115.36/27,758.78 = 11,162.79/x
  3. Step 3: Cross multiply
    20,115.36x = 27,758.78 × 11,162.79
  4. Step 4: Simplify right side
    20,115.36x = 309,865,431.80
  5. Step 5: Solve for x
    x = 309,865,431.80/20,115.36
  6. Step 6: Final answer
    x = 15,404.42

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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.