Home / 20,450.50-28,221.42-11,375.80

Finding the Fourth Proportional to 20,450.50, 28,221.42 and 11,375.80

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Solution

The fourth proportional to 20,450.50, 28,221.42 and 11,375.80 is: 15,698.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,450.50 : 28,221.42 = 11,375.80 : x
  2. Step 2: Convert to fraction form
    20,450.50/28,221.42 = 11,375.80/x
  3. Step 3: Cross multiply
    20,450.50x = 28,221.42 × 11,375.80
  4. Step 4: Simplify right side
    20,450.50x = 321,041,229.64
  5. Step 5: Solve for x
    x = 321,041,229.64/20,450.50
  6. Step 6: Final answer
    x = 15,698.45

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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.