Home / 13,729.88-20,578.91-6,318.78

Finding the Fourth Proportional to 13,729.88, 20,578.91 and 6,318.78

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Solution

The fourth proportional to 13,729.88, 20,578.91 and 6,318.78 is: 9,470.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.88 : 20,578.91 = 6,318.78 : x
  2. Step 2: Convert to fraction form
    13,729.88/20,578.91 = 6,318.78/x
  3. Step 3: Cross multiply
    13,729.88x = 20,578.91 × 6,318.78
  4. Step 4: Simplify right side
    13,729.88x = 130,033,604.93
  5. Step 5: Solve for x
    x = 130,033,604.93/13,729.88
  6. Step 6: Final answer
    x = 9,470.85

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1.5x scale

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.