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Finding the Fourth Proportional to 18,211.92, 27,342.12 and 12,308.64

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Solution

The fourth proportional to 18,211.92, 27,342.12 and 12,308.64 is: 18,479.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,211.92 : 27,342.12 = 12,308.64 : x
  2. Step 2: Convert to fraction form
    18,211.92/27,342.12 = 12,308.64/x
  3. Step 3: Cross multiply
    18,211.92x = 27,342.12 × 12,308.64
  4. Step 4: Simplify right side
    18,211.92x = 336,544,311.92
  5. Step 5: Solve for x
    x = 336,544,311.92/18,211.92
  6. Step 6: Final answer
    x = 18,479.34

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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.