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Finding the Fourth Proportional to 21,161.97, 31,757.54 and 7,310.97

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Solution

The fourth proportional to 21,161.97, 31,757.54 and 7,310.97 is: 10,971.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.97 : 31,757.54 = 7,310.97 : x
  2. Step 2: Convert to fraction form
    21,161.97/31,757.54 = 7,310.97/x
  3. Step 3: Cross multiply
    21,161.97x = 31,757.54 × 7,310.97
  4. Step 4: Simplify right side
    21,161.97x = 232,178,385.66
  5. Step 5: Solve for x
    x = 232,178,385.66/21,161.97
  6. Step 6: Final answer
    x = 10,971.49

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Similar ratio
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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.