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Finding the Fourth Proportional to 20,572.58, 30,861.41 and 7,242.44

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Solution

The fourth proportional to 20,572.58, 30,861.41 and 7,242.44 is: 10,864.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.58 : 30,861.41 = 7,242.44 : x
  2. Step 2: Convert to fraction form
    20,572.58/30,861.41 = 7,242.44/x
  3. Step 3: Cross multiply
    20,572.58x = 30,861.41 × 7,242.44
  4. Step 4: Simplify right side
    20,572.58x = 223,511,719.72
  5. Step 5: Solve for x
    x = 223,511,719.72/20,572.58
  6. Step 6: Final answer
    x = 10,864.54

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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.