Home / 12,198.78-18,336.87-11,680.38

Finding the Fourth Proportional to 12,198.78, 18,336.87 and 11,680.38

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Solution

The fourth proportional to 12,198.78, 18,336.87 and 11,680.38 is: 17,557.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,198.78 : 18,336.87 = 11,680.38 : x
  2. Step 2: Convert to fraction form
    12,198.78/18,336.87 = 11,680.38/x
  3. Step 3: Cross multiply
    12,198.78x = 18,336.87 × 11,680.38
  4. Step 4: Simplify right side
    12,198.78x = 214,181,609.61
  5. Step 5: Solve for x
    x = 214,181,609.61/12,198.78
  6. Step 6: Final answer
    x = 17,557.63

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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.