Home / 20,515.86-28,311.90-11,084.43

Finding the Fourth Proportional to 20,515.86, 28,311.90 and 11,084.43

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Solution

The fourth proportional to 20,515.86, 28,311.90 and 11,084.43 is: 15,296.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.86 : 28,311.90 = 11,084.43 : x
  2. Step 2: Convert to fraction form
    20,515.86/28,311.90 = 11,084.43/x
  3. Step 3: Cross multiply
    20,515.86x = 28,311.90 × 11,084.43
  4. Step 4: Simplify right side
    20,515.86x = 313,821,273.72
  5. Step 5: Solve for x
    x = 313,821,273.72/20,515.86
  6. Step 6: Final answer
    x = 15,296.52

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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.