Home / 20,824.75-28,738.20-11,393.38

Finding the Fourth Proportional to 20,824.75, 28,738.20 and 11,393.38

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Solution

The fourth proportional to 20,824.75, 28,738.20 and 11,393.38 is: 15,722.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,824.75 : 28,738.20 = 11,393.38 : x
  2. Step 2: Convert to fraction form
    20,824.75/28,738.20 = 11,393.38/x
  3. Step 3: Cross multiply
    20,824.75x = 28,738.20 × 11,393.38
  4. Step 4: Simplify right side
    20,824.75x = 327,425,233.12
  5. Step 5: Solve for x
    x = 327,425,233.12/20,824.75
  6. Step 6: Final answer
    x = 15,722.89

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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.