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Finding the Fourth Proportional to 6,751.70, 9,318.20 and 3,918.47

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Solution

The fourth proportional to 6,751.70, 9,318.20 and 3,918.47 is: 5,407.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,751.70 : 9,318.20 = 3,918.47 : x
  2. Step 2: Convert to fraction form
    6,751.70/9,318.20 = 3,918.47/x
  3. Step 3: Cross multiply
    6,751.70x = 9,318.20 × 3,918.47
  4. Step 4: Simplify right side
    6,751.70x = 36,513,020.97
  5. Step 5: Solve for x
    x = 36,513,020.97/6,751.70
  6. Step 6: Final answer
    x = 5,407.98

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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.