Home / 20,189.26-27,865.20-11,692.78

Finding the Fourth Proportional to 20,189.26, 27,865.20 and 11,692.78

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Solution

The fourth proportional to 20,189.26, 27,865.20 and 11,692.78 is: 16,138.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,189.26 : 27,865.20 = 11,692.78 : x
  2. Step 2: Convert to fraction form
    20,189.26/27,865.20 = 11,692.78/x
  3. Step 3: Cross multiply
    20,189.26x = 27,865.20 × 11,692.78
  4. Step 4: Simplify right side
    20,189.26x = 325,821,653.26
  5. Step 5: Solve for x
    x = 325,821,653.26/20,189.26
  6. Step 6: Final answer
    x = 16,138.37

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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.