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Finding the Fourth Proportional to 13,606.33, 18,776.66 and 7,638.00

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Solution

The fourth proportional to 13,606.33, 18,776.66 and 7,638.00 is: 10,540.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,606.33 : 18,776.66 = 7,638.00 : x
  2. Step 2: Convert to fraction form
    13,606.33/18,776.66 = 7,638.00/x
  3. Step 3: Cross multiply
    13,606.33x = 18,776.66 × 7,638.00
  4. Step 4: Simplify right side
    13,606.33x = 143,416,063.44
  5. Step 5: Solve for x
    x = 143,416,063.44/13,606.33
  6. Step 6: Final answer
    x = 10,540.39

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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.