Home / 20,179.80-27,843.60-12,221.88

Finding the Fourth Proportional to 20,179.80, 27,843.60 and 12,221.88

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Solution

The fourth proportional to 20,179.80, 27,843.60 and 12,221.88 is: 16,863.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,179.80 : 27,843.60 = 12,221.88 : x
  2. Step 2: Convert to fraction form
    20,179.80/27,843.60 = 12,221.88/x
  3. Step 3: Cross multiply
    20,179.80x = 27,843.60 × 12,221.88
  4. Step 4: Simplify right side
    20,179.80x = 340,301,137.97
  5. Step 5: Solve for x
    x = 340,301,137.97/20,179.80
  6. Step 6: Final answer
    x = 16,863.45

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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.