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Finding the Fourth Proportional to 17,361.09, 26,020.72 and 7,988.17

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Solution

The fourth proportional to 17,361.09, 26,020.72 and 7,988.17 is: 11,972.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,361.09 : 26,020.72 = 7,988.17 : x
  2. Step 2: Convert to fraction form
    17,361.09/26,020.72 = 7,988.17/x
  3. Step 3: Cross multiply
    17,361.09x = 26,020.72 × 7,988.17
  4. Step 4: Simplify right side
    17,361.09x = 207,857,934.88
  5. Step 5: Solve for x
    x = 207,857,934.88/17,361.09
  6. Step 6: Final answer
    x = 11,972.63

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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.