Home / 20,515.22-28,311.02-11,083.79

Finding the Fourth Proportional to 20,515.22, 28,311.02 and 11,083.79

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Solution

The fourth proportional to 20,515.22, 28,311.02 and 11,083.79 is: 15,295.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.22 : 28,311.02 = 11,083.79 : x
  2. Step 2: Convert to fraction form
    20,515.22/28,311.02 = 11,083.79/x
  3. Step 3: Cross multiply
    20,515.22x = 28,311.02 × 11,083.79
  4. Step 4: Simplify right side
    20,515.22x = 313,793,203.39
  5. Step 5: Solve for x
    x = 313,793,203.39/20,515.22
  6. Step 6: Final answer
    x = 15,295.63

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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.