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Finding the Fourth Proportional to 18,138.37, 27,178.39 and 15,222.37

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Solution

The fourth proportional to 18,138.37, 27,178.39 and 15,222.37 is: 22,809.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.37 : 27,178.39 = 15,222.37 : x
  2. Step 2: Convert to fraction form
    18,138.37/27,178.39 = 15,222.37/x
  3. Step 3: Cross multiply
    18,138.37x = 27,178.39 × 15,222.37
  4. Step 4: Simplify right side
    18,138.37x = 413,719,296.58
  5. Step 5: Solve for x
    x = 413,719,296.58/18,138.37
  6. Step 6: Final answer
    x = 22,809.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.