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Finding the Fourth Proportional to 7,169.90, 9,893.21 and 3,982.68

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Solution

The fourth proportional to 7,169.90, 9,893.21 and 3,982.68 is: 5,495.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,169.90 : 9,893.21 = 3,982.68 : x
  2. Step 2: Convert to fraction form
    7,169.90/9,893.21 = 3,982.68/x
  3. Step 3: Cross multiply
    7,169.90x = 9,893.21 × 3,982.68
  4. Step 4: Simplify right side
    7,169.90x = 39,401,469.69
  5. Step 5: Solve for x
    x = 39,401,469.69/7,169.90
  6. Step 6: Final answer
    x = 5,495.40

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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.