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Finding the Fourth Proportional to 12,649.97, 18,974.05 and 7,137.82

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Solution

The fourth proportional to 12,649.97, 18,974.05 and 7,137.82 is: 10,706.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,649.97 : 18,974.05 = 7,137.82 : x
  2. Step 2: Convert to fraction form
    12,649.97/18,974.05 = 7,137.82/x
  3. Step 3: Cross multiply
    12,649.97x = 18,974.05 × 7,137.82
  4. Step 4: Simplify right side
    12,649.97x = 135,433,359.44
  5. Step 5: Solve for x
    x = 135,433,359.44/12,649.97
  6. Step 6: Final answer
    x = 10,706.22

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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.