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Finding the Fourth Proportional to 11,687.38, 17,531.07 and 3,479.38

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Solution

The fourth proportional to 11,687.38, 17,531.07 and 3,479.38 is: 5,219.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,687.38 : 17,531.07 = 3,479.38 : x
  2. Step 2: Convert to fraction form
    11,687.38/17,531.07 = 3,479.38/x
  3. Step 3: Cross multiply
    11,687.38x = 17,531.07 × 3,479.38
  4. Step 4: Simplify right side
    11,687.38x = 60,997,254.34
  5. Step 5: Solve for x
    x = 60,997,254.34/11,687.38
  6. Step 6: Final answer
    x = 5,219.07

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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.