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Finding the Fourth Proportional to 18,691.78, 25,796.82 and 10,731.10

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Solution

The fourth proportional to 18,691.78, 25,796.82 and 10,731.10 is: 14,810.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.78 : 25,796.82 = 10,731.10 : x
  2. Step 2: Convert to fraction form
    18,691.78/25,796.82 = 10,731.10/x
  3. Step 3: Cross multiply
    18,691.78x = 25,796.82 × 10,731.10
  4. Step 4: Simplify right side
    18,691.78x = 276,828,255.10
  5. Step 5: Solve for x
    x = 276,828,255.10/18,691.78
  6. Step 6: Final answer
    x = 14,810.16

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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.