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Finding the Fourth Proportional to 18,405.92, 27,608.88 and 12,164.47

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Solution

The fourth proportional to 18,405.92, 27,608.88 and 12,164.47 is: 18,246.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,405.92 : 27,608.88 = 12,164.47 : x
  2. Step 2: Convert to fraction form
    18,405.92/27,608.88 = 12,164.47/x
  3. Step 3: Cross multiply
    18,405.92x = 27,608.88 × 12,164.47
  4. Step 4: Simplify right side
    18,405.92x = 335,847,392.49
  5. Step 5: Solve for x
    x = 335,847,392.49/18,405.92
  6. Step 6: Final answer
    x = 18,246.71

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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.