Home / 13,414.80-20,121.54-6,389.70

Finding the Fourth Proportional to 13,414.80, 20,121.54 and 6,389.70

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Solution

The fourth proportional to 13,414.80, 20,121.54 and 6,389.70 is: 9,584.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,414.80 : 20,121.54 = 6,389.70 : x
  2. Step 2: Convert to fraction form
    13,414.80/20,121.54 = 6,389.70/x
  3. Step 3: Cross multiply
    13,414.80x = 20,121.54 × 6,389.70
  4. Step 4: Simplify right side
    13,414.80x = 128,570,604.14
  5. Step 5: Solve for x
    x = 128,570,604.14/13,414.80
  6. Step 6: Final answer
    x = 9,584.24

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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.