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Finding the Fourth Proportional to 18,663.96, 25,747.20 and 11,944.20

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Solution

The fourth proportional to 18,663.96, 25,747.20 and 11,944.20 is: 16,477.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663.96 : 25,747.20 = 11,944.20 : x
  2. Step 2: Convert to fraction form
    18,663.96/25,747.20 = 11,944.20/x
  3. Step 3: Cross multiply
    18,663.96x = 25,747.20 × 11,944.20
  4. Step 4: Simplify right side
    18,663.96x = 307,529,710.89
  5. Step 5: Solve for x
    x = 307,529,710.89/18,663.96
  6. Step 6: Final answer
    x = 16,477.19

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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.