Home / 13,290.40-19,936.61-3,429.66

Finding the Fourth Proportional to 13,290.40, 19,936.61 and 3,429.66

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Solution

The fourth proportional to 13,290.40, 19,936.61 and 3,429.66 is: 5,144.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.40 : 19,936.61 = 3,429.66 : x
  2. Step 2: Convert to fraction form
    13,290.40/19,936.61 = 3,429.66/x
  3. Step 3: Cross multiply
    13,290.40x = 19,936.61 × 3,429.66
  4. Step 4: Simplify right side
    13,290.40x = 68,375,793.85
  5. Step 5: Solve for x
    x = 68,375,793.85/13,290.40
  6. Step 6: Final answer
    x = 5,144.75

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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.