Home / 45,418.90-68,120.25-13,821.31

Finding the Fourth Proportional to 45,418.90, 68,120.25 and 13,821.31

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Solution

The fourth proportional to 45,418.90, 68,120.25 and 13,821.31 is: 20,729.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,418.90 : 68,120.25 = 13,821.31 : x
  2. Step 2: Convert to fraction form
    45,418.90/68,120.25 = 13,821.31/x
  3. Step 3: Cross multiply
    45,418.90x = 68,120.25 × 13,821.31
  4. Step 4: Simplify right side
    45,418.90x = 941,511,092.53
  5. Step 5: Solve for x
    x = 941,511,092.53/45,418.90
  6. Step 6: Final answer
    x = 20,729.50

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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.