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Finding the Fourth Proportional to 20,469.96, 30,703.68 and 7,321.68

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Solution

The fourth proportional to 20,469.96, 30,703.68 and 7,321.68 is: 10,982.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,469.96 : 30,703.68 = 7,321.68 : x
  2. Step 2: Convert to fraction form
    20,469.96/30,703.68 = 7,321.68/x
  3. Step 3: Cross multiply
    20,469.96x = 30,703.68 × 7,321.68
  4. Step 4: Simplify right side
    20,469.96x = 224,802,519.78
  5. Step 5: Solve for x
    x = 224,802,519.78/20,469.96
  6. Step 6: Final answer
    x = 10,982.07

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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.