Home / 20,083.90-27,715.84-11,131.55

Finding the Fourth Proportional to 20,083.90, 27,715.84 and 11,131.55

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Solution

The fourth proportional to 20,083.90, 27,715.84 and 11,131.55 is: 15,361.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,083.90 : 27,715.84 = 11,131.55 : x
  2. Step 2: Convert to fraction form
    20,083.90/27,715.84 = 11,131.55/x
  3. Step 3: Cross multiply
    20,083.90x = 27,715.84 × 11,131.55
  4. Step 4: Simplify right side
    20,083.90x = 308,520,258.75
  5. Step 5: Solve for x
    x = 308,520,258.75/20,083.90
  6. Step 6: Final answer
    x = 15,361.57

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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.