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Finding the Fourth Proportional to 4,986.60, 7,469.10 and 4,122.60

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Solution

The fourth proportional to 4,986.60, 7,469.10 and 4,122.60 is: 6,174.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,986.60 : 7,469.10 = 4,122.60 : x
  2. Step 2: Convert to fraction form
    4,986.60/7,469.10 = 4,122.60/x
  3. Step 3: Cross multiply
    4,986.60x = 7,469.10 × 4,122.60
  4. Step 4: Simplify right side
    4,986.60x = 30,792,111.66
  5. Step 5: Solve for x
    x = 30,792,111.66/4,986.60
  6. Step 6: Final answer
    x = 6,174.97

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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.