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Finding the Fourth Proportional to 22,917, 31,625.46 and 12,981

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Solution

The fourth proportional to 22,917, 31,625.46 and 12,981 is: 17,913.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,917 : 31,625.46 = 12,981 : x
  2. Step 2: Convert to fraction form
    22,917/31,625.46 = 12,981/x
  3. Step 3: Cross multiply
    22,917x = 31,625.46 × 12,981
  4. Step 4: Simplify right side
    22,917x = 410,530,096.26
  5. Step 5: Solve for x
    x = 410,530,096.26/22,917
  6. Step 6: Final answer
    x = 17,913.78

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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.