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Finding the Fourth Proportional to 18,448.86, 27,676.82 and 7,917.38

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Solution

The fourth proportional to 18,448.86, 27,676.82 and 7,917.38 is: 11,877.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,448.86 : 27,676.82 = 7,917.38 : x
  2. Step 2: Convert to fraction form
    18,448.86/27,676.82 = 7,917.38/x
  3. Step 3: Cross multiply
    18,448.86x = 27,676.82 × 7,917.38
  4. Step 4: Simplify right side
    18,448.86x = 219,127,886.33
  5. Step 5: Solve for x
    x = 219,127,886.33/18,448.86
  6. Step 6: Final answer
    x = 11,877.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.