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Finding the Fourth Proportional to 20,605.56, 28,437.09 and 11,653.11

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Solution

The fourth proportional to 20,605.56, 28,437.09 and 11,653.11 is: 16,082.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.56 : 28,437.09 = 11,653.11 : x
  2. Step 2: Convert to fraction form
    20,605.56/28,437.09 = 11,653.11/x
  3. Step 3: Cross multiply
    20,605.56x = 28,437.09 × 11,653.11
  4. Step 4: Simplify right side
    20,605.56x = 331,380,537.85
  5. Step 5: Solve for x
    x = 331,380,537.85/20,605.56
  6. Step 6: Final answer
    x = 16,082.09

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1.5x scale

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.