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Finding the Fourth Proportional to 12,490.80, 17,257.56 and 12,367.92

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Solution

The fourth proportional to 12,490.80, 17,257.56 and 12,367.92 is: 17,087.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,490.80 : 17,257.56 = 12,367.92 : x
  2. Step 2: Convert to fraction form
    12,490.80/17,257.56 = 12,367.92/x
  3. Step 3: Cross multiply
    12,490.80x = 17,257.56 × 12,367.92
  4. Step 4: Simplify right side
    12,490.80x = 213,440,121.48
  5. Step 5: Solve for x
    x = 213,440,121.48/12,490.80
  6. Step 6: Final answer
    x = 17,087.79

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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.