Home / 20,823.11-28,735.82-11,391.66

Finding the Fourth Proportional to 20,823.11, 28,735.82 and 11,391.66

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Solution

The fourth proportional to 20,823.11, 28,735.82 and 11,391.66 is: 15,720.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.11 : 28,735.82 = 11,391.66 : x
  2. Step 2: Convert to fraction form
    20,823.11/28,735.82 = 11,391.66/x
  3. Step 3: Cross multiply
    20,823.11x = 28,735.82 × 11,391.66
  4. Step 4: Simplify right side
    20,823.11x = 327,348,634.30
  5. Step 5: Solve for x
    x = 327,348,634.30/20,823.11
  6. Step 6: Final answer
    x = 15,720.45

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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.