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Finding the Fourth Proportional to 18,513.78, 27,770.10 and 8,125.56

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Solution

The fourth proportional to 18,513.78, 27,770.10 and 8,125.56 is: 12,188.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,513.78 : 27,770.10 = 8,125.56 : x
  2. Step 2: Convert to fraction form
    18,513.78/27,770.10 = 8,125.56/x
  3. Step 3: Cross multiply
    18,513.78x = 27,770.10 × 8,125.56
  4. Step 4: Simplify right side
    18,513.78x = 225,647,613.76
  5. Step 5: Solve for x
    x = 225,647,613.76/18,513.78
  6. Step 6: Final answer
    x = 12,188.09

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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.