Home / 20,361.35-28,100.39-11,408.73

Finding the Fourth Proportional to 20,361.35, 28,100.39 and 11,408.73

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Solution

The fourth proportional to 20,361.35, 28,100.39 and 11,408.73 is: 15,745.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.35 : 28,100.39 = 11,408.73 : x
  2. Step 2: Convert to fraction form
    20,361.35/28,100.39 = 11,408.73/x
  3. Step 3: Cross multiply
    20,361.35x = 28,100.39 × 11,408.73
  4. Step 4: Simplify right side
    20,361.35x = 320,589,705.36
  5. Step 5: Solve for x
    x = 320,589,705.36/20,361.35
  6. Step 6: Final answer
    x = 15,745.02

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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.