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Finding the Fourth Proportional to 20,201.78, 27,868.02 and 11,813.42

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Solution

The fourth proportional to 20,201.78, 27,868.02 and 11,813.42 is: 16,296.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,201.78 : 27,868.02 = 11,813.42 : x
  2. Step 2: Convert to fraction form
    20,201.78/27,868.02 = 11,813.42/x
  3. Step 3: Cross multiply
    20,201.78x = 27,868.02 × 11,813.42
  4. Step 4: Simplify right side
    20,201.78x = 329,216,624.83
  5. Step 5: Solve for x
    x = 329,216,624.83/20,201.78
  6. Step 6: Final answer
    x = 16,296.42

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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.