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Finding the Fourth Proportional to 11,428.70, 17,144.76 and 3,639.26

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Solution

The fourth proportional to 11,428.70, 17,144.76 and 3,639.26 is: 5,459.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,428.70 : 17,144.76 = 3,639.26 : x
  2. Step 2: Convert to fraction form
    11,428.70/17,144.76 = 3,639.26/x
  3. Step 3: Cross multiply
    11,428.70x = 17,144.76 × 3,639.26
  4. Step 4: Simplify right side
    11,428.70x = 62,394,239.28
  5. Step 5: Solve for x
    x = 62,394,239.28/11,428.70
  6. Step 6: Final answer
    x = 5,459.43

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.