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Finding the Fourth Proportional to 18,318.63, 27,481.59 and 7,788.57

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Solution

The fourth proportional to 18,318.63, 27,481.59 and 7,788.57 is: 11,684.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,318.63 : 27,481.59 = 7,788.57 : x
  2. Step 2: Convert to fraction form
    18,318.63/27,481.59 = 7,788.57/x
  3. Step 3: Cross multiply
    18,318.63x = 27,481.59 × 7,788.57
  4. Step 4: Simplify right side
    18,318.63x = 214,042,233.97
  5. Step 5: Solve for x
    x = 214,042,233.97/18,318.63
  6. Step 6: Final answer
    x = 11,684.40

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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.