Home / 8,138.90-12,208.35-2,943.56

Finding the Fourth Proportional to 8,138.90, 12,208.35 and 2,943.56

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Solution

The fourth proportional to 8,138.90, 12,208.35 and 2,943.56 is: 4,415.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.90 : 12,208.35 = 2,943.56 : x
  2. Step 2: Convert to fraction form
    8,138.90/12,208.35 = 2,943.56/x
  3. Step 3: Cross multiply
    8,138.90x = 12,208.35 × 2,943.56
  4. Step 4: Simplify right side
    8,138.90x = 35,936,010.73
  5. Step 5: Solve for x
    x = 35,936,010.73/8,138.90
  6. Step 6: Final answer
    x = 4,415.34

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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.