Home / 20,091.45-27,726.41-11,139.09

Finding the Fourth Proportional to 20,091.45, 27,726.41 and 11,139.09

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Solution

The fourth proportional to 20,091.45, 27,726.41 and 11,139.09 is: 15,372.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,091.45 : 27,726.41 = 11,139.09 : x
  2. Step 2: Convert to fraction form
    20,091.45/27,726.41 = 11,139.09/x
  3. Step 3: Cross multiply
    20,091.45x = 27,726.41 × 11,139.09
  4. Step 4: Simplify right side
    20,091.45x = 308,846,920.67
  5. Step 5: Solve for x
    x = 308,846,920.67/20,091.45
  6. Step 6: Final answer
    x = 15,372.06

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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.