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Finding the Fourth Proportional to 9,963.56, 14,948.80 and 4,420.79

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Solution

The fourth proportional to 9,963.56, 14,948.80 and 4,420.79 is: 6,632.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,963.56 : 14,948.80 = 4,420.79 : x
  2. Step 2: Convert to fraction form
    9,963.56/14,948.80 = 4,420.79/x
  3. Step 3: Cross multiply
    9,963.56x = 14,948.80 × 4,420.79
  4. Step 4: Simplify right side
    9,963.56x = 66,085,584.77
  5. Step 5: Solve for x
    x = 66,085,584.77/9,963.56
  6. Step 6: Final answer
    x = 6,632.73

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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.