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Finding the Fourth Proportional to 18,662.90, 25,753.83 and 11,589.17

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Solution

The fourth proportional to 18,662.90, 25,753.83 and 11,589.17 is: 15,992.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.90 : 25,753.83 = 11,589.17 : x
  2. Step 2: Convert to fraction form
    18,662.90/25,753.83 = 11,589.17/x
  3. Step 3: Cross multiply
    18,662.90x = 25,753.83 × 11,589.17
  4. Step 4: Simplify right side
    18,662.90x = 298,465,514.02
  5. Step 5: Solve for x
    x = 298,465,514.02/18,662.90
  6. Step 6: Final answer
    x = 15,992.45

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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.