Home / 20,680.92-28,540.26-11,250.09

Finding the Fourth Proportional to 20,680.92, 28,540.26 and 11,250.09

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Solution

The fourth proportional to 20,680.92, 28,540.26 and 11,250.09 is: 15,525.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.92 : 28,540.26 = 11,250.09 : x
  2. Step 2: Convert to fraction form
    20,680.92/28,540.26 = 11,250.09/x
  3. Step 3: Cross multiply
    20,680.92x = 28,540.26 × 11,250.09
  4. Step 4: Simplify right side
    20,680.92x = 321,080,493.62
  5. Step 5: Solve for x
    x = 321,080,493.62/20,680.92
  6. Step 6: Final answer
    x = 15,525.45

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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.