Home / 12,640.80-18,965.28-3,877.44

Finding the Fourth Proportional to 12,640.80, 18,965.28 and 3,877.44

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Solution

The fourth proportional to 12,640.80, 18,965.28 and 3,877.44 is: 5,817.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.80 : 18,965.28 = 3,877.44 : x
  2. Step 2: Convert to fraction form
    12,640.80/18,965.28 = 3,877.44/x
  3. Step 3: Cross multiply
    12,640.80x = 18,965.28 × 3,877.44
  4. Step 4: Simplify right side
    12,640.80x = 73,536,735.28
  5. Step 5: Solve for x
    x = 73,536,735.28/12,640.80
  6. Step 6: Final answer
    x = 5,817.41

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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.