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Finding the Fourth Proportional to 31,673.97, 43,711.25 and 20,495.97

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Solution

The fourth proportional to 31,673.97, 43,711.25 and 20,495.97 is: 28,285.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,673.97 : 43,711.25 = 20,495.97 : x
  2. Step 2: Convert to fraction form
    31,673.97/43,711.25 = 20,495.97/x
  3. Step 3: Cross multiply
    31,673.97x = 43,711.25 × 20,495.97
  4. Step 4: Simplify right side
    31,673.97x = 895,904,366.18
  5. Step 5: Solve for x
    x = 895,904,366.18/31,673.97
  6. Step 6: Final answer
    x = 28,285.19

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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.