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Finding the Fourth Proportional to 18,661.78, 27,954.87 and 8,652.43

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Solution

The fourth proportional to 18,661.78, 27,954.87 and 8,652.43 is: 12,961.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.78 : 27,954.87 = 8,652.43 : x
  2. Step 2: Convert to fraction form
    18,661.78/27,954.87 = 8,652.43/x
  3. Step 3: Cross multiply
    18,661.78x = 27,954.87 × 8,652.43
  4. Step 4: Simplify right side
    18,661.78x = 241,877,555.83
  5. Step 5: Solve for x
    x = 241,877,555.83/18,661.78
  6. Step 6: Final answer
    x = 12,961.12

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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.