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Finding the Fourth Proportional to 10,408.64, 15,619.07 and 3,839.41

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Solution

The fourth proportional to 10,408.64, 15,619.07 and 3,839.41 is: 5,761.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,408.64 : 15,619.07 = 3,839.41 : x
  2. Step 2: Convert to fraction form
    10,408.64/15,619.07 = 3,839.41/x
  3. Step 3: Cross multiply
    10,408.64x = 15,619.07 × 3,839.41
  4. Step 4: Simplify right side
    10,408.64x = 59,967,984.10
  5. Step 5: Solve for x
    x = 59,967,984.10/10,408.64
  6. Step 6: Final answer
    x = 5,761.36

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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.