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Finding the Fourth Proportional to 12,846.55, 17,725.97 and 7,179.49

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Solution

The fourth proportional to 12,846.55, 17,725.97 and 7,179.49 is: 9,906.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,846.55 : 17,725.97 = 7,179.49 : x
  2. Step 2: Convert to fraction form
    12,846.55/17,725.97 = 7,179.49/x
  3. Step 3: Cross multiply
    12,846.55x = 17,725.97 × 7,179.49
  4. Step 4: Simplify right side
    12,846.55x = 127,263,299.83
  5. Step 5: Solve for x
    x = 127,263,299.83/12,846.55
  6. Step 6: Final answer
    x = 9,906.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.