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Finding the Fourth Proportional to 18,973.25, 26,181.09 and 11,013.92

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Solution

The fourth proportional to 18,973.25, 26,181.09 and 11,013.92 is: 15,198.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973.25 : 26,181.09 = 11,013.92 : x
  2. Step 2: Convert to fraction form
    18,973.25/26,181.09 = 11,013.92/x
  3. Step 3: Cross multiply
    18,973.25x = 26,181.09 × 11,013.92
  4. Step 4: Simplify right side
    18,973.25x = 288,356,299.87
  5. Step 5: Solve for x
    x = 288,356,299.87/18,973.25
  6. Step 6: Final answer
    x = 15,198.05

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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.