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Finding the Fourth Proportional to 18,318.74, 27,481.67 and 7,788.64

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Solution

The fourth proportional to 18,318.74, 27,481.67 and 7,788.64 is: 11,684.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,318.74 : 27,481.67 = 7,788.64 : x
  2. Step 2: Convert to fraction form
    18,318.74/27,481.67 = 7,788.64/x
  3. Step 3: Cross multiply
    18,318.74x = 27,481.67 × 7,788.64
  4. Step 4: Simplify right side
    18,318.74x = 214,044,834.23
  5. Step 5: Solve for x
    x = 214,044,834.23/18,318.74
  6. Step 6: Final answer
    x = 11,684.47

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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.