Home / 20,949.36-28,908.78-11,517.90

Finding the Fourth Proportional to 20,949.36, 28,908.78 and 11,517.90

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Solution

The fourth proportional to 20,949.36, 28,908.78 and 11,517.90 is: 15,893.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.36 : 28,908.78 = 11,517.90 : x
  2. Step 2: Convert to fraction form
    20,949.36/28,908.78 = 11,517.90/x
  3. Step 3: Cross multiply
    20,949.36x = 28,908.78 × 11,517.90
  4. Step 4: Simplify right side
    20,949.36x = 332,968,437.16
  5. Step 5: Solve for x
    x = 332,968,437.16/20,949.36
  6. Step 6: Final answer
    x = 15,893.97

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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.