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Finding the Fourth Proportional to 18,978.39, 26,190.03 and 10,481.04

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Solution

The fourth proportional to 18,978.39, 26,190.03 and 10,481.04 is: 14,463.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978.39 : 26,190.03 = 10,481.04 : x
  2. Step 2: Convert to fraction form
    18,978.39/26,190.03 = 10,481.04/x
  3. Step 3: Cross multiply
    18,978.39x = 26,190.03 × 10,481.04
  4. Step 4: Simplify right side
    18,978.39x = 274,498,752.03
  5. Step 5: Solve for x
    x = 274,498,752.03/18,978.39
  6. Step 6: Final answer
    x = 14,463.75

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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.