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Finding the Fourth Proportional to 11,479, 17,221.38 and 3,271

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Solution

The fourth proportional to 11,479, 17,221.38 and 3,271 is: 4,907.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,479 : 17,221.38 = 3,271 : x
  2. Step 2: Convert to fraction form
    11,479/17,221.38 = 3,271/x
  3. Step 3: Cross multiply
    11,479x = 17,221.38 × 3,271
  4. Step 4: Simplify right side
    11,479x = 56,331,133.98
  5. Step 5: Solve for x
    x = 56,331,133.98/11,479
  6. Step 6: Final answer
    x = 4,907.32

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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.