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Finding the Fourth Proportional to 12,972.88, 17,896.36 and 12,469.92

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Solution

The fourth proportional to 12,972.88, 17,896.36 and 12,469.92 is: 17,202.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,972.88 : 17,896.36 = 12,469.92 : x
  2. Step 2: Convert to fraction form
    12,972.88/17,896.36 = 12,469.92/x
  3. Step 3: Cross multiply
    12,972.88x = 17,896.36 × 12,469.92
  4. Step 4: Simplify right side
    12,972.88x = 223,166,177.49
  5. Step 5: Solve for x
    x = 223,166,177.49/12,972.88
  6. Step 6: Final answer
    x = 17,202.52

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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.