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Finding the Fourth Proportional to 6,815.04, 9,405.30 and 3,831

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Solution

The fourth proportional to 6,815.04, 9,405.30 and 3,831 is: 5,287.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,815.04 : 9,405.30 = 3,831 : x
  2. Step 2: Convert to fraction form
    6,815.04/9,405.30 = 3,831/x
  3. Step 3: Cross multiply
    6,815.04x = 9,405.30 × 3,831
  4. Step 4: Simplify right side
    6,815.04x = 36,031,704.30
  5. Step 5: Solve for x
    x = 36,031,704.30/6,815.04
  6. Step 6: Final answer
    x = 5,287.09

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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.