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Finding the Fourth Proportional to 6,640.13, 9,163.81 and 3,845.63

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Solution

The fourth proportional to 6,640.13, 9,163.81 and 3,845.63 is: 5,307.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.13 : 9,163.81 = 3,845.63 : x
  2. Step 2: Convert to fraction form
    6,640.13/9,163.81 = 3,845.63/x
  3. Step 3: Cross multiply
    6,640.13x = 9,163.81 × 3,845.63
  4. Step 4: Simplify right side
    6,640.13x = 35,240,576.83
  5. Step 5: Solve for x
    x = 35,240,576.83/6,640.13
  6. Step 6: Final answer
    x = 5,307.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.