Home / 20,630.14-28,469.67-11,198.71

Finding the Fourth Proportional to 20,630.14, 28,469.67 and 11,198.71

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Solution

The fourth proportional to 20,630.14, 28,469.67 and 11,198.71 is: 15,454.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.14 : 28,469.67 = 11,198.71 : x
  2. Step 2: Convert to fraction form
    20,630.14/28,469.67 = 11,198.71/x
  3. Step 3: Cross multiply
    20,630.14x = 28,469.67 × 11,198.71
  4. Step 4: Simplify right side
    20,630.14x = 318,823,578.13
  5. Step 5: Solve for x
    x = 318,823,578.13/20,630.14
  6. Step 6: Final answer
    x = 15,454.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.