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Finding the Fourth Proportional to 6,756,855.72, 9,321,866.34 and 3,856,407.72

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Solution

The fourth proportional to 6,756,855.72, 9,321,866.34 and 3,856,407.72 is: 5,320,361.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,756,855.72 : 9,321,866.34 = 3,856,407.72 : x
  2. Step 2: Convert to fraction form
    6,756,855.72/9,321,866.34 = 3,856,407.72/x
  3. Step 3: Cross multiply
    6,756,855.72x = 9,321,866.34 × 3,856,407.72
  4. Step 4: Simplify right side
    6,756,855.72x = 35,948,917,318,384.15
  5. Step 5: Solve for x
    x = 35,948,917,318,384.15/6,756,855.72
  6. Step 6: Final answer
    x = 5,320,361.84

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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.