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Finding the Fourth Proportional to 17,103.89, 25,662.02 and 12,211.90

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Solution

The fourth proportional to 17,103.89, 25,662.02 and 12,211.90 is: 18,322.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,103.89 : 25,662.02 = 12,211.90 : x
  2. Step 2: Convert to fraction form
    17,103.89/25,662.02 = 12,211.90/x
  3. Step 3: Cross multiply
    17,103.89x = 25,662.02 × 12,211.90
  4. Step 4: Simplify right side
    17,103.89x = 313,381,896.82
  5. Step 5: Solve for x
    x = 313,381,896.82/17,103.89
  6. Step 6: Final answer
    x = 18,322.26

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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.