Home / 20,083.90-27,716-11,131.56

Finding the Fourth Proportional to 20,083.90, 27,716 and 11,131.56

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Solution

The fourth proportional to 20,083.90, 27,716 and 11,131.56 is: 15,361.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,083.90 : 27,716 = 11,131.56 : x
  2. Step 2: Convert to fraction form
    20,083.90/27,716 = 11,131.56/x
  3. Step 3: Cross multiply
    20,083.90x = 27,716 × 11,131.56
  4. Step 4: Simplify right side
    20,083.90x = 308,522,316.96
  5. Step 5: Solve for x
    x = 308,522,316.96/20,083.90
  6. Step 6: Final answer
    x = 15,361.67

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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.