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Finding the Fourth Proportional to 8,608.60, 12,914.70 and 2,765.80

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Solution

The fourth proportional to 8,608.60, 12,914.70 and 2,765.80 is: 4,149.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,608.60 : 12,914.70 = 2,765.80 : x
  2. Step 2: Convert to fraction form
    8,608.60/12,914.70 = 2,765.80/x
  3. Step 3: Cross multiply
    8,608.60x = 12,914.70 × 2,765.80
  4. Step 4: Simplify right side
    8,608.60x = 35,719,477.26
  5. Step 5: Solve for x
    x = 35,719,477.26/8,608.60
  6. Step 6: Final answer
    x = 4,149.28

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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.