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Finding the Fourth Proportional to 8,240.74, 12,361.51 and 2,692.64

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Solution

The fourth proportional to 8,240.74, 12,361.51 and 2,692.64 is: 4,039.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,240.74 : 12,361.51 = 2,692.64 : x
  2. Step 2: Convert to fraction form
    8,240.74/12,361.51 = 2,692.64/x
  3. Step 3: Cross multiply
    8,240.74x = 12,361.51 × 2,692.64
  4. Step 4: Simplify right side
    8,240.74x = 33,285,130.56
  5. Step 5: Solve for x
    x = 33,285,130.56/8,240.74
  6. Step 6: Final answer
    x = 4,039.10

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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.