Home / 20,147.78-27,808.45-11,198.42

Finding the Fourth Proportional to 20,147.78, 27,808.45 and 11,198.42

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Solution

The fourth proportional to 20,147.78, 27,808.45 and 11,198.42 is: 15,456.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.78 : 27,808.45 = 11,198.42 : x
  2. Step 2: Convert to fraction form
    20,147.78/27,808.45 = 11,198.42/x
  3. Step 3: Cross multiply
    20,147.78x = 27,808.45 × 11,198.42
  4. Step 4: Simplify right side
    20,147.78x = 311,410,702.65
  5. Step 5: Solve for x
    x = 311,410,702.65/20,147.78
  6. Step 6: Final answer
    x = 15,456.33

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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.