Home / 20,772.20-31,151.76-6,728.97

Finding the Fourth Proportional to 20,772.20, 31,151.76 and 6,728.97

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Solution

The fourth proportional to 20,772.20, 31,151.76 and 6,728.97 is: 10,091.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.20 : 31,151.76 = 6,728.97 : x
  2. Step 2: Convert to fraction form
    20,772.20/31,151.76 = 6,728.97/x
  3. Step 3: Cross multiply
    20,772.20x = 31,151.76 × 6,728.97
  4. Step 4: Simplify right side
    20,772.20x = 209,619,267.53
  5. Step 5: Solve for x
    x = 209,619,267.53/20,772.20
  6. Step 6: Final answer
    x = 10,091.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.