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Finding the Fourth Proportional to 6,405.12, 9,609.11 and 1,963.41

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Solution

The fourth proportional to 6,405.12, 9,609.11 and 1,963.41 is: 2,945.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,405.12 : 9,609.11 = 1,963.41 : x
  2. Step 2: Convert to fraction form
    6,405.12/9,609.11 = 1,963.41/x
  3. Step 3: Cross multiply
    6,405.12x = 9,609.11 × 1,963.41
  4. Step 4: Simplify right side
    6,405.12x = 18,866,569.71
  5. Step 5: Solve for x
    x = 18,866,569.71/6,405.12
  6. Step 6: Final answer
    x = 2,945.54

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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.