Home / 20,138.19-27,789.94-11,186.27

Finding the Fourth Proportional to 20,138.19, 27,789.94 and 11,186.27

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Solution

The fourth proportional to 20,138.19, 27,789.94 and 11,186.27 is: 15,436.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.19 : 27,789.94 = 11,186.27 : x
  2. Step 2: Convert to fraction form
    20,138.19/27,789.94 = 11,186.27/x
  3. Step 3: Cross multiply
    20,138.19x = 27,789.94 × 11,186.27
  4. Step 4: Simplify right side
    20,138.19x = 310,865,772.12
  5. Step 5: Solve for x
    x = 310,865,772.12/20,138.19
  6. Step 6: Final answer
    x = 15,436.63

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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.