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Finding the Fourth Proportional to 11,428.74, 17,128.98 and 6,744

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Solution

The fourth proportional to 11,428.74, 17,128.98 and 6,744 is: 10,107.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,428.74 : 17,128.98 = 6,744 : x
  2. Step 2: Convert to fraction form
    11,428.74/17,128.98 = 6,744/x
  3. Step 3: Cross multiply
    11,428.74x = 17,128.98 × 6,744
  4. Step 4: Simplify right side
    11,428.74x = 115,517,841.12
  5. Step 5: Solve for x
    x = 115,517,841.12/11,428.74
  6. Step 6: Final answer
    x = 10,107.66

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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.