Home / 20,515.23-28,273.83-15,200.82

Finding the Fourth Proportional to 20,515.23, 28,273.83 and 15,200.82

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Solution

The fourth proportional to 20,515.23, 28,273.83 and 15,200.82 is: 20,949.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.23 : 28,273.83 = 15,200.82 : x
  2. Step 2: Convert to fraction form
    20,515.23/28,273.83 = 15,200.82/x
  3. Step 3: Cross multiply
    20,515.23x = 28,273.83 × 15,200.82
  4. Step 4: Simplify right side
    20,515.23x = 429,785,400.54
  5. Step 5: Solve for x
    x = 429,785,400.54/20,515.23
  6. Step 6: Final answer
    x = 20,949.58

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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.