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Finding the Fourth Proportional to 16,881.40, 25,346.40 and 11,972.80

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Solution

The fourth proportional to 16,881.40, 25,346.40 and 11,972.80 is: 17,976.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,881.40 : 25,346.40 = 11,972.80 : x
  2. Step 2: Convert to fraction form
    16,881.40/25,346.40 = 11,972.80/x
  3. Step 3: Cross multiply
    16,881.40x = 25,346.40 × 11,972.80
  4. Step 4: Simplify right side
    16,881.40x = 303,467,377.92
  5. Step 5: Solve for x
    x = 303,467,377.92/16,881.40
  6. Step 6: Final answer
    x = 17,976.43

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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.