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Finding the Fourth Proportional to 18,674.52, 27,981.54 and 11,736.60

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Solution

The fourth proportional to 18,674.52, 27,981.54 and 11,736.60 is: 17,585.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,674.52 : 27,981.54 = 11,736.60 : x
  2. Step 2: Convert to fraction form
    18,674.52/27,981.54 = 11,736.60/x
  3. Step 3: Cross multiply
    18,674.52x = 27,981.54 × 11,736.60
  4. Step 4: Simplify right side
    18,674.52x = 328,408,142.36
  5. Step 5: Solve for x
    x = 328,408,142.36/18,674.52
  6. Step 6: Final answer
    x = 17,585.89

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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.