Home / 20,515.23-28,311.03-11,083.80

Finding the Fourth Proportional to 20,515.23, 28,311.03 and 11,083.80

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Solution

The fourth proportional to 20,515.23, 28,311.03 and 11,083.80 is: 15,295.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.23 : 28,311.03 = 11,083.80 : x
  2. Step 2: Convert to fraction form
    20,515.23/28,311.03 = 11,083.80/x
  3. Step 3: Cross multiply
    20,515.23x = 28,311.03 × 11,083.80
  4. Step 4: Simplify right side
    20,515.23x = 313,793,794.31
  5. Step 5: Solve for x
    x = 313,793,794.31/20,515.23
  6. Step 6: Final answer
    x = 15,295.65

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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.