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Finding the Fourth Proportional to 20,863.92, 31,301 and 6,072.97

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Solution

The fourth proportional to 20,863.92, 31,301 and 6,072.97 is: 9,110.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.92 : 31,301 = 6,072.97 : x
  2. Step 2: Convert to fraction form
    20,863.92/31,301 = 6,072.97/x
  3. Step 3: Cross multiply
    20,863.92x = 31,301 × 6,072.97
  4. Step 4: Simplify right side
    20,863.92x = 190,090,033.97
  5. Step 5: Solve for x
    x = 190,090,033.97/20,863.92
  6. Step 6: Final answer
    x = 9,110.95

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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.