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Finding the Fourth Proportional to 3,893.84, 5,839.68 and 2,660.96

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Solution

The fourth proportional to 3,893.84, 5,839.68 and 2,660.96 is: 3,990.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,893.84 : 5,839.68 = 2,660.96 : x
  2. Step 2: Convert to fraction form
    3,893.84/5,839.68 = 2,660.96/x
  3. Step 3: Cross multiply
    3,893.84x = 5,839.68 × 2,660.96
  4. Step 4: Simplify right side
    3,893.84x = 15,539,154.89
  5. Step 5: Solve for x
    x = 15,539,154.89/3,893.84
  6. Step 6: Final answer
    x = 3,990.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.