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Finding the Fourth Proportional to 43,665.78, 65,443.86 and 18,676.44

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Solution

The fourth proportional to 43,665.78, 65,443.86 and 18,676.44 is: 27,991.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,665.78 : 65,443.86 = 18,676.44 : x
  2. Step 2: Convert to fraction form
    43,665.78/65,443.86 = 18,676.44/x
  3. Step 3: Cross multiply
    43,665.78x = 65,443.86 × 18,676.44
  4. Step 4: Simplify right side
    43,665.78x = 1,222,258,324.66
  5. Step 5: Solve for x
    x = 1,222,258,324.66/43,665.78
  6. Step 6: Final answer
    x = 27,991.22

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1.5x scale

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.