Home / 20,137.78-27,785.66-12,179.84

Finding the Fourth Proportional to 20,137.78, 27,785.66 and 12,179.84

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Solution

The fourth proportional to 20,137.78, 27,785.66 and 12,179.84 is: 16,805.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,137.78 : 27,785.66 = 12,179.84 : x
  2. Step 2: Convert to fraction form
    20,137.78/27,785.66 = 12,179.84/x
  3. Step 3: Cross multiply
    20,137.78x = 27,785.66 × 12,179.84
  4. Step 4: Simplify right side
    20,137.78x = 338,424,893.09
  5. Step 5: Solve for x
    x = 338,424,893.09/20,137.78
  6. Step 6: Final answer
    x = 16,805.47

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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.