Home / 20,091.72-27,725.82-11,139.36

Finding the Fourth Proportional to 20,091.72, 27,725.82 and 11,139.36

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Solution

The fourth proportional to 20,091.72, 27,725.82 and 11,139.36 is: 15,371.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,091.72 : 27,725.82 = 11,139.36 : x
  2. Step 2: Convert to fraction form
    20,091.72/27,725.82 = 11,139.36/x
  3. Step 3: Cross multiply
    20,091.72x = 27,725.82 × 11,139.36
  4. Step 4: Simplify right side
    20,091.72x = 308,847,890.28
  5. Step 5: Solve for x
    x = 308,847,890.28/20,091.72
  6. Step 6: Final answer
    x = 15,371.90

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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.