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Finding the Fourth Proportional to 20,324.88, 30,489.78 and 7,174.56

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Solution

The fourth proportional to 20,324.88, 30,489.78 and 7,174.56 is: 10,762.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,324.88 : 30,489.78 = 7,174.56 : x
  2. Step 2: Convert to fraction form
    20,324.88/30,489.78 = 7,174.56/x
  3. Step 3: Cross multiply
    20,324.88x = 30,489.78 × 7,174.56
  4. Step 4: Simplify right side
    20,324.88x = 218,750,756.00
  5. Step 5: Solve for x
    x = 218,750,756.00/20,324.88
  6. Step 6: Final answer
    x = 10,762.71

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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.