Home / 20,450.30-28,221.14-11,375.58

Finding the Fourth Proportional to 20,450.30, 28,221.14 and 11,375.58

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Solution

The fourth proportional to 20,450.30, 28,221.14 and 11,375.58 is: 15,698.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,450.30 : 28,221.14 = 11,375.58 : x
  2. Step 2: Convert to fraction form
    20,450.30/28,221.14 = 11,375.58/x
  3. Step 3: Cross multiply
    20,450.30x = 28,221.14 × 11,375.58
  4. Step 4: Simplify right side
    20,450.30x = 321,031,778.88
  5. Step 5: Solve for x
    x = 321,031,778.88/20,450.30
  6. Step 6: Final answer
    x = 15,698.14

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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.