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Finding the Fourth Proportional to 20,576.72, 28,394.19 and 11,625

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Solution

The fourth proportional to 20,576.72, 28,394.19 and 11,625 is: 16,041.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,576.72 : 28,394.19 = 11,625 : x
  2. Step 2: Convert to fraction form
    20,576.72/28,394.19 = 11,625/x
  3. Step 3: Cross multiply
    20,576.72x = 28,394.19 × 11,625
  4. Step 4: Simplify right side
    20,576.72x = 330,082,458.75
  5. Step 5: Solve for x
    x = 330,082,458.75/20,576.72
  6. Step 6: Final answer
    x = 16,041.55

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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.