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Finding the Fourth Proportional to 6,642, 9,963.72 and 2,259.78

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Solution

The fourth proportional to 6,642, 9,963.72 and 2,259.78 is: 3,389.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,642 : 9,963.72 = 2,259.78 : x
  2. Step 2: Convert to fraction form
    6,642/9,963.72 = 2,259.78/x
  3. Step 3: Cross multiply
    6,642x = 9,963.72 × 2,259.78
  4. Step 4: Simplify right side
    6,642x = 22,515,815.18
  5. Step 5: Solve for x
    x = 22,515,815.18/6,642
  6. Step 6: Final answer
    x = 3,389.91

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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.