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Finding the Fourth Proportional to 18,181.96, 27,221.10 and 12,329.80

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Solution

The fourth proportional to 18,181.96, 27,221.10 and 12,329.80 is: 18,459.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,181.96 : 27,221.10 = 12,329.80 : x
  2. Step 2: Convert to fraction form
    18,181.96/27,221.10 = 12,329.80/x
  3. Step 3: Cross multiply
    18,181.96x = 27,221.10 × 12,329.80
  4. Step 4: Simplify right side
    18,181.96x = 335,630,718.78
  5. Step 5: Solve for x
    x = 335,630,718.78/18,181.96
  6. Step 6: Final answer
    x = 18,459.55

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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.