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Finding the Fourth Proportional to 6,908.72, 10,361.18 and 1,909.90

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Solution

The fourth proportional to 6,908.72, 10,361.18 and 1,909.90 is: 2,864.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,908.72 : 10,361.18 = 1,909.90 : x
  2. Step 2: Convert to fraction form
    6,908.72/10,361.18 = 1,909.90/x
  3. Step 3: Cross multiply
    6,908.72x = 10,361.18 × 1,909.90
  4. Step 4: Simplify right side
    6,908.72x = 19,788,817.68
  5. Step 5: Solve for x
    x = 19,788,817.68/6,908.72
  6. Step 6: Final answer
    x = 2,864.32

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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.