Home / 20,515.17-28,310.85-11,083.71

Finding the Fourth Proportional to 20,515.17, 28,310.85 and 11,083.71

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Solution

The fourth proportional to 20,515.17, 28,310.85 and 11,083.71 is: 15,295.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.17 : 28,310.85 = 11,083.71 : x
  2. Step 2: Convert to fraction form
    20,515.17/28,310.85 = 11,083.71/x
  3. Step 3: Cross multiply
    20,515.17x = 28,310.85 × 11,083.71
  4. Step 4: Simplify right side
    20,515.17x = 313,789,251.25
  5. Step 5: Solve for x
    x = 313,789,251.25/20,515.17
  6. Step 6: Final answer
    x = 15,295.47

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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.