Home / 20,820.20-28,732.26-11,388.96

Finding the Fourth Proportional to 20,820.20, 28,732.26 and 11,388.96

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Solution

The fourth proportional to 20,820.20, 28,732.26 and 11,388.96 is: 15,716.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.20 : 28,732.26 = 11,388.96 : x
  2. Step 2: Convert to fraction form
    20,820.20/28,732.26 = 11,388.96/x
  3. Step 3: Cross multiply
    20,820.20x = 28,732.26 × 11,388.96
  4. Step 4: Simplify right side
    20,820.20x = 327,230,559.85
  5. Step 5: Solve for x
    x = 327,230,559.85/20,820.20
  6. Step 6: Final answer
    x = 15,716.98

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.