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Finding the Fourth Proportional to 18,181.20, 27,268.20 and 8,821.20

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Solution

The fourth proportional to 18,181.20, 27,268.20 and 8,821.20 is: 13,230.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,181.20 : 27,268.20 = 8,821.20 : x
  2. Step 2: Convert to fraction form
    18,181.20/27,268.20 = 8,821.20/x
  3. Step 3: Cross multiply
    18,181.20x = 27,268.20 × 8,821.20
  4. Step 4: Simplify right side
    18,181.20x = 240,538,245.84
  5. Step 5: Solve for x
    x = 240,538,245.84/18,181.20
  6. Step 6: Final answer
    x = 13,230.05

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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.