Home / 20,091.85-27,726.30-11,139.27

Finding the Fourth Proportional to 20,091.85, 27,726.30 and 11,139.27

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Solution

The fourth proportional to 20,091.85, 27,726.30 and 11,139.27 is: 15,371.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,091.85 : 27,726.30 = 11,139.27 : x
  2. Step 2: Convert to fraction form
    20,091.85/27,726.30 = 11,139.27/x
  3. Step 3: Cross multiply
    20,091.85x = 27,726.30 × 11,139.27
  4. Step 4: Simplify right side
    20,091.85x = 308,850,741.80
  5. Step 5: Solve for x
    x = 308,850,741.80/20,091.85
  6. Step 6: Final answer
    x = 15,371.94

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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.