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Finding the Fourth Proportional to 18,481.44, 27,680.51 and 12,959.42

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Solution

The fourth proportional to 18,481.44, 27,680.51 and 12,959.42 is: 19,409.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.44 : 27,680.51 = 12,959.42 : x
  2. Step 2: Convert to fraction form
    18,481.44/27,680.51 = 12,959.42/x
  3. Step 3: Cross multiply
    18,481.44x = 27,680.51 × 12,959.42
  4. Step 4: Simplify right side
    18,481.44x = 358,723,290.30
  5. Step 5: Solve for x
    x = 358,723,290.30/18,481.44
  6. Step 6: Final answer
    x = 19,409.92

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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.