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Finding the Fourth Proportional to 20,163.56, 30,245.22 and 7,851.56

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Solution

The fourth proportional to 20,163.56, 30,245.22 and 7,851.56 is: 11,777.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,163.56 : 30,245.22 = 7,851.56 : x
  2. Step 2: Convert to fraction form
    20,163.56/30,245.22 = 7,851.56/x
  3. Step 3: Cross multiply
    20,163.56x = 30,245.22 × 7,851.56
  4. Step 4: Simplify right side
    20,163.56x = 237,472,159.54
  5. Step 5: Solve for x
    x = 237,472,159.54/20,163.56
  6. Step 6: Final answer
    x = 11,777.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.