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Finding the Fourth Proportional to 20,369.67, 30,509.34 and 15,654.96

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Solution

The fourth proportional to 20,369.67, 30,509.34 and 15,654.96 is: 23,447.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,369.67 : 30,509.34 = 15,654.96 : x
  2. Step 2: Convert to fraction form
    20,369.67/30,509.34 = 15,654.96/x
  3. Step 3: Cross multiply
    20,369.67x = 30,509.34 × 15,654.96
  4. Step 4: Simplify right side
    20,369.67x = 477,622,497.33
  5. Step 5: Solve for x
    x = 477,622,497.33/20,369.67
  6. Step 6: Final answer
    x = 23,447.73

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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.