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Finding the Fourth Proportional to 20,147.10, 28,235.10 and 20,147.10

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Solution

The fourth proportional to 20,147.10, 28,235.10 and 20,147.10 is: 28,235.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.10 : 28,235.10 = 20,147.10 : x
  2. Step 2: Convert to fraction form
    20,147.10/28,235.10 = 20,147.10/x
  3. Step 3: Cross multiply
    20,147.10x = 28,235.10 × 20,147.10
  4. Step 4: Simplify right side
    20,147.10x = 568,855,383.21
  5. Step 5: Solve for x
    x = 568,855,383.21/20,147.10
  6. Step 6: Final answer
    x = 28,235.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.