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Finding the Fourth Proportional to 20,640.33, 30,965.73 and 9,554.97

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Solution

The fourth proportional to 20,640.33, 30,965.73 and 9,554.97 is: 14,334.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.33 : 30,965.73 = 9,554.97 : x
  2. Step 2: Convert to fraction form
    20,640.33/30,965.73 = 9,554.97/x
  3. Step 3: Cross multiply
    20,640.33x = 30,965.73 × 9,554.97
  4. Step 4: Simplify right side
    20,640.33x = 295,876,621.18
  5. Step 5: Solve for x
    x = 295,876,621.18/20,640.33
  6. Step 6: Final answer
    x = 14,334.88

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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.