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Finding the Fourth Proportional to 12,676.88, 19,022.20 and 5,286.48

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Solution

The fourth proportional to 12,676.88, 19,022.20 and 5,286.48 is: 7,932.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,676.88 : 19,022.20 = 5,286.48 : x
  2. Step 2: Convert to fraction form
    12,676.88/19,022.20 = 5,286.48/x
  3. Step 3: Cross multiply
    12,676.88x = 19,022.20 × 5,286.48
  4. Step 4: Simplify right side
    12,676.88x = 100,560,479.86
  5. Step 5: Solve for x
    x = 100,560,479.86/12,676.88
  6. Step 6: Final answer
    x = 7,932.59

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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.