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Finding the Fourth Proportional to 20,559, 28,375.26 and 11,727

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Solution

The fourth proportional to 20,559, 28,375.26 and 11,727 is: 16,185.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559 : 28,375.26 = 11,727 : x
  2. Step 2: Convert to fraction form
    20,559/28,375.26 = 11,727/x
  3. Step 3: Cross multiply
    20,559x = 28,375.26 × 11,727
  4. Step 4: Simplify right side
    20,559x = 332,756,674.02
  5. Step 5: Solve for x
    x = 332,756,674.02/20,559
  6. Step 6: Final answer
    x = 16,185.45

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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.