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Finding the Fourth Proportional to 7,125.97, 9,833.87 and 3,982.21

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Solution

The fourth proportional to 7,125.97, 9,833.87 and 3,982.21 is: 5,495.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,125.97 : 9,833.87 = 3,982.21 : x
  2. Step 2: Convert to fraction form
    7,125.97/9,833.87 = 3,982.21/x
  3. Step 3: Cross multiply
    7,125.97x = 9,833.87 × 3,982.21
  4. Step 4: Simplify right side
    7,125.97x = 39,160,535.45
  5. Step 5: Solve for x
    x = 39,160,535.45/7,125.97
  6. Step 6: Final answer
    x = 5,495.47

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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.