Home / 20,822.85-28,736.21-11,391.41

Finding the Fourth Proportional to 20,822.85, 28,736.21 and 11,391.41

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Solution

The fourth proportional to 20,822.85, 28,736.21 and 11,391.41 is: 15,720.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.85 : 28,736.21 = 11,391.41 : x
  2. Step 2: Convert to fraction form
    20,822.85/28,736.21 = 11,391.41/x
  3. Step 3: Cross multiply
    20,822.85x = 28,736.21 × 11,391.41
  4. Step 4: Simplify right side
    20,822.85x = 327,345,821.16
  5. Step 5: Solve for x
    x = 327,345,821.16/20,822.85
  6. Step 6: Final answer
    x = 15,720.51

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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.