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Finding the Fourth Proportional to 18,078.44, 27,112.88 and 8,215.53

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Solution

The fourth proportional to 18,078.44, 27,112.88 and 8,215.53 is: 12,321.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,078.44 : 27,112.88 = 8,215.53 : x
  2. Step 2: Convert to fraction form
    18,078.44/27,112.88 = 8,215.53/x
  3. Step 3: Cross multiply
    18,078.44x = 27,112.88 × 8,215.53
  4. Step 4: Simplify right side
    18,078.44x = 222,746,551.68
  5. Step 5: Solve for x
    x = 222,746,551.68/18,078.44
  6. Step 6: Final answer
    x = 12,321.12

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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.