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Finding the Fourth Proportional to 20,379.92, 30,577.62 and 10,512.92

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Solution

The fourth proportional to 20,379.92, 30,577.62 and 10,512.92 is: 15,773.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.92 : 30,577.62 = 10,512.92 : x
  2. Step 2: Convert to fraction form
    20,379.92/30,577.62 = 10,512.92/x
  3. Step 3: Cross multiply
    20,379.92x = 30,577.62 × 10,512.92
  4. Step 4: Simplify right side
    20,379.92x = 321,460,072.85
  5. Step 5: Solve for x
    x = 321,460,072.85/20,379.92
  6. Step 6: Final answer
    x = 15,773.37

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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.