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Finding the Fourth Proportional to 18,186.78, 27,280.09 and 5,039.11

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Solution

The fourth proportional to 18,186.78, 27,280.09 and 5,039.11 is: 7,558.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,186.78 : 27,280.09 = 5,039.11 : x
  2. Step 2: Convert to fraction form
    18,186.78/27,280.09 = 5,039.11/x
  3. Step 3: Cross multiply
    18,186.78x = 27,280.09 × 5,039.11
  4. Step 4: Simplify right side
    18,186.78x = 137,467,414.72
  5. Step 5: Solve for x
    x = 137,467,414.72/18,186.78
  6. Step 6: Final answer
    x = 7,558.65

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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.