Home / 20,081.88-27,713.60-11,128.54

Finding the Fourth Proportional to 20,081.88, 27,713.60 and 11,128.54

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Solution

The fourth proportional to 20,081.88, 27,713.60 and 11,128.54 is: 15,357.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.88 : 27,713.60 = 11,128.54 : x
  2. Step 2: Convert to fraction form
    20,081.88/27,713.60 = 11,128.54/x
  3. Step 3: Cross multiply
    20,081.88x = 27,713.60 × 11,128.54
  4. Step 4: Simplify right side
    20,081.88x = 308,411,906.14
  5. Step 5: Solve for x
    x = 308,411,906.14/20,081.88
  6. Step 6: Final answer
    x = 15,357.72

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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.