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Finding the Fourth Proportional to 13,617.39, 18,793.20 and 7,650.51

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Solution

The fourth proportional to 13,617.39, 18,793.20 and 7,650.51 is: 10,558.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,617.39 : 18,793.20 = 7,650.51 : x
  2. Step 2: Convert to fraction form
    13,617.39/18,793.20 = 7,650.51/x
  3. Step 3: Cross multiply
    13,617.39x = 18,793.20 × 7,650.51
  4. Step 4: Simplify right side
    13,617.39x = 143,777,564.53
  5. Step 5: Solve for x
    x = 143,777,564.53/13,617.39
  6. Step 6: Final answer
    x = 10,558.38

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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.