Home / 20,138.03-27,789.71-11,186.10

Finding the Fourth Proportional to 20,138.03, 27,789.71 and 11,186.10

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Solution

The fourth proportional to 20,138.03, 27,789.71 and 11,186.10 is: 15,436.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.03 : 27,789.71 = 11,186.10 : x
  2. Step 2: Convert to fraction form
    20,138.03/27,789.71 = 11,186.10/x
  3. Step 3: Cross multiply
    20,138.03x = 27,789.71 × 11,186.10
  4. Step 4: Simplify right side
    20,138.03x = 310,858,488.57
  5. Step 5: Solve for x
    x = 310,858,488.57/20,138.03
  6. Step 6: Final answer
    x = 15,436.39

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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.