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Finding the Fourth Proportional to 6,422.40, 9,635.40 and 3,135.60

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Solution

The fourth proportional to 6,422.40, 9,635.40 and 3,135.60 is: 4,704.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,422.40 : 9,635.40 = 3,135.60 : x
  2. Step 2: Convert to fraction form
    6,422.40/9,635.40 = 3,135.60/x
  3. Step 3: Cross multiply
    6,422.40x = 9,635.40 × 3,135.60
  4. Step 4: Simplify right side
    6,422.40x = 30,212,760.24
  5. Step 5: Solve for x
    x = 30,212,760.24/6,422.40
  6. Step 6: Final answer
    x = 4,704.28

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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.