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Finding the Fourth Proportional to 20,561.41, 28,375 and 12,063.09

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Solution

The fourth proportional to 20,561.41, 28,375 and 12,063.09 is: 16,647.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.41 : 28,375 = 12,063.09 : x
  2. Step 2: Convert to fraction form
    20,561.41/28,375 = 12,063.09/x
  3. Step 3: Cross multiply
    20,561.41x = 28,375 × 12,063.09
  4. Step 4: Simplify right side
    20,561.41x = 342,290,178.75
  5. Step 5: Solve for x
    x = 342,290,178.75/20,561.41
  6. Step 6: Final answer
    x = 16,647.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.