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Finding the Fourth Proportional to 6,865.78, 9,474.78 and 3,721.96

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Solution

The fourth proportional to 6,865.78, 9,474.78 and 3,721.96 is: 5,136.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,865.78 : 9,474.78 = 3,721.96 : x
  2. Step 2: Convert to fraction form
    6,865.78/9,474.78 = 3,721.96/x
  3. Step 3: Cross multiply
    6,865.78x = 9,474.78 × 3,721.96
  4. Step 4: Simplify right side
    6,865.78x = 35,264,752.17
  5. Step 5: Solve for x
    x = 35,264,752.17/6,865.78
  6. Step 6: Final answer
    x = 5,136.31

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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.