Home / 20,942.92-28,901.82-11,512.12

Finding the Fourth Proportional to 20,942.92, 28,901.82 and 11,512.12

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Solution

The fourth proportional to 20,942.92, 28,901.82 and 11,512.12 is: 15,887.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.92 : 28,901.82 = 11,512.12 : x
  2. Step 2: Convert to fraction form
    20,942.92/28,901.82 = 11,512.12/x
  3. Step 3: Cross multiply
    20,942.92x = 28,901.82 × 11,512.12
  4. Step 4: Simplify right side
    20,942.92x = 332,721,220.06
  5. Step 5: Solve for x
    x = 332,721,220.06/20,942.92
  6. Step 6: Final answer
    x = 15,887.05

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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.