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Finding the Fourth Proportional to 18,603.24, 27,900.54 and 6,921.96

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Solution

The fourth proportional to 18,603.24, 27,900.54 and 6,921.96 is: 10,381.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,603.24 : 27,900.54 = 6,921.96 : x
  2. Step 2: Convert to fraction form
    18,603.24/27,900.54 = 6,921.96/x
  3. Step 3: Cross multiply
    18,603.24x = 27,900.54 × 6,921.96
  4. Step 4: Simplify right side
    18,603.24x = 193,126,421.86
  5. Step 5: Solve for x
    x = 193,126,421.86/18,603.24
  6. Step 6: Final answer
    x = 10,381.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.