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Finding the Fourth Proportional to 12,652.26, 18,978.40 and 3,418.26

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Solution

The fourth proportional to 12,652.26, 18,978.40 and 3,418.26 is: 5,127.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,652.26 : 18,978.40 = 3,418.26 : x
  2. Step 2: Convert to fraction form
    12,652.26/18,978.40 = 3,418.26/x
  3. Step 3: Cross multiply
    12,652.26x = 18,978.40 × 3,418.26
  4. Step 4: Simplify right side
    12,652.26x = 64,873,105.58
  5. Step 5: Solve for x
    x = 64,873,105.58/12,652.26
  6. Step 6: Final answer
    x = 5,127.39

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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.