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Finding the Fourth Proportional to 20,702.72, 30,958.70 and 15,375.96

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Solution

The fourth proportional to 20,702.72, 30,958.70 and 15,375.96 is: 22,993.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.72 : 30,958.70 = 15,375.96 : x
  2. Step 2: Convert to fraction form
    20,702.72/30,958.70 = 15,375.96/x
  3. Step 3: Cross multiply
    20,702.72x = 30,958.70 × 15,375.96
  4. Step 4: Simplify right side
    20,702.72x = 476,019,655.97
  5. Step 5: Solve for x
    x = 476,019,655.97/20,702.72
  6. Step 6: Final answer
    x = 22,993.10

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