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Finding the Fourth Proportional to 18,323.50, 25,286.44 and 9,940

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Solution

The fourth proportional to 18,323.50, 25,286.44 and 9,940 is: 13,717.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,323.50 : 25,286.44 = 9,940 : x
  2. Step 2: Convert to fraction form
    18,323.50/25,286.44 = 9,940/x
  3. Step 3: Cross multiply
    18,323.50x = 25,286.44 × 9,940
  4. Step 4: Simplify right side
    18,323.50x = 251,347,213.60
  5. Step 5: Solve for x
    x = 251,347,213.60/18,323.50
  6. Step 6: Final answer
    x = 13,717.21

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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.