Home / 13,429.26-20,137.91-7,188.07

Finding the Fourth Proportional to 13,429.26, 20,137.91 and 7,188.07

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Solution

The fourth proportional to 13,429.26, 20,137.91 and 7,188.07 is: 10,778.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,429.26 : 20,137.91 = 7,188.07 : x
  2. Step 2: Convert to fraction form
    13,429.26/20,137.91 = 7,188.07/x
  3. Step 3: Cross multiply
    13,429.26x = 20,137.91 × 7,188.07
  4. Step 4: Simplify right side
    13,429.26x = 144,752,706.73
  5. Step 5: Solve for x
    x = 144,752,706.73/13,429.26
  6. Step 6: Final answer
    x = 10,778.90

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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.