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Finding the Fourth Proportional to 8,505.78, 12,760.90 and 2,662.44

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Solution

The fourth proportional to 8,505.78, 12,760.90 and 2,662.44 is: 3,994.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505.78 : 12,760.90 = 2,662.44 : x
  2. Step 2: Convert to fraction form
    8,505.78/12,760.90 = 2,662.44/x
  3. Step 3: Cross multiply
    8,505.78x = 12,760.90 × 2,662.44
  4. Step 4: Simplify right side
    8,505.78x = 33,975,130.60
  5. Step 5: Solve for x
    x = 33,975,130.60/8,505.78
  6. Step 6: Final answer
    x = 3,994.36

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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.