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Finding the Fourth Proportional to 6,671.87, 9,207.12 and 3,687.78

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Solution

The fourth proportional to 6,671.87, 9,207.12 and 3,687.78 is: 5,089.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,671.87 : 9,207.12 = 3,687.78 : x
  2. Step 2: Convert to fraction form
    6,671.87/9,207.12 = 3,687.78/x
  3. Step 3: Cross multiply
    6,671.87x = 9,207.12 × 3,687.78
  4. Step 4: Simplify right side
    6,671.87x = 33,953,808.82
  5. Step 5: Solve for x
    x = 33,953,808.82/6,671.87
  6. Step 6: Final answer
    x = 5,089.10

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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.