Home / 20,819.82-28,734.09-11,865.27

Finding the Fourth Proportional to 20,819.82, 28,734.09 and 11,865.27

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Solution

The fourth proportional to 20,819.82, 28,734.09 and 11,865.27 is: 16,375.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.82 : 28,734.09 = 11,865.27 : x
  2. Step 2: Convert to fraction form
    20,819.82/28,734.09 = 11,865.27/x
  3. Step 3: Cross multiply
    20,819.82x = 28,734.09 × 11,865.27
  4. Step 4: Simplify right side
    20,819.82x = 340,937,736.05
  5. Step 5: Solve for x
    x = 340,937,736.05/20,819.82
  6. Step 6: Final answer
    x = 16,375.63

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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.