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Finding the Fourth Proportional to 6,861, 10,289.46 and 2,180.82

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Solution

The fourth proportional to 6,861, 10,289.46 and 2,180.82 is: 3,270.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,861 : 10,289.46 = 2,180.82 : x
  2. Step 2: Convert to fraction form
    6,861/10,289.46 = 2,180.82/x
  3. Step 3: Cross multiply
    6,861x = 10,289.46 × 2,180.82
  4. Step 4: Simplify right side
    6,861x = 22,439,460.16
  5. Step 5: Solve for x
    x = 22,439,460.16/6,861
  6. Step 6: Final answer
    x = 3,270.58

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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.