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Finding the Fourth Proportional to 18,418.05, 25,406.06 and 13,034.43

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Solution

The fourth proportional to 18,418.05, 25,406.06 and 13,034.43 is: 17,979.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,418.05 : 25,406.06 = 13,034.43 : x
  2. Step 2: Convert to fraction form
    18,418.05/25,406.06 = 13,034.43/x
  3. Step 3: Cross multiply
    18,418.05x = 25,406.06 × 13,034.43
  4. Step 4: Simplify right side
    18,418.05x = 331,153,445.47
  5. Step 5: Solve for x
    x = 331,153,445.47/18,418.05
  6. Step 6: Final answer
    x = 17,979.83

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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.