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Finding the Fourth Proportional to 6,781.34, 9,358.77 and 3,949.60

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Solution

The fourth proportional to 6,781.34, 9,358.77 and 3,949.60 is: 5,450.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,781.34 : 9,358.77 = 3,949.60 : x
  2. Step 2: Convert to fraction form
    6,781.34/9,358.77 = 3,949.60/x
  3. Step 3: Cross multiply
    6,781.34x = 9,358.77 × 3,949.60
  4. Step 4: Simplify right side
    6,781.34x = 36,963,397.99
  5. Step 5: Solve for x
    x = 36,963,397.99/6,781.34
  6. Step 6: Final answer
    x = 5,450.75

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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.