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Finding the Fourth Proportional to 6,781.62, 9,358 and 3,948.87

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Solution

The fourth proportional to 6,781.62, 9,358 and 3,948.87 is: 5,449.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,781.62 : 9,358 = 3,948.87 : x
  2. Step 2: Convert to fraction form
    6,781.62/9,358 = 3,948.87/x
  3. Step 3: Cross multiply
    6,781.62x = 9,358 × 3,948.87
  4. Step 4: Simplify right side
    6,781.62x = 36,953,525.46
  5. Step 5: Solve for x
    x = 36,953,525.46/6,781.62
  6. Step 6: Final answer
    x = 5,449.07

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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.