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Finding the Fourth Proportional to 8,415, 12,625.12 and 3,486.96

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Solution

The fourth proportional to 8,415, 12,625.12 and 3,486.96 is: 5,231.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415 : 12,625.12 = 3,486.96 : x
  2. Step 2: Convert to fraction form
    8,415/12,625.12 = 3,486.96/x
  3. Step 3: Cross multiply
    8,415x = 12,625.12 × 3,486.96
  4. Step 4: Simplify right side
    8,415x = 44,023,288.44
  5. Step 5: Solve for x
    x = 44,023,288.44/8,415
  6. Step 6: Final answer
    x = 5,231.53

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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.