Home / 3,172.88-4,408.77-3,138.66

Finding the Fourth Proportional to 3,172.88, 4,408.77 and 3,138.66

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Solution

The fourth proportional to 3,172.88, 4,408.77 and 3,138.66 is: 4,361.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.88 : 4,408.77 = 3,138.66 : x
  2. Step 2: Convert to fraction form
    3,172.88/4,408.77 = 3,138.66/x
  3. Step 3: Cross multiply
    3,172.88x = 4,408.77 × 3,138.66
  4. Step 4: Simplify right side
    3,172.88x = 13,837,641.82
  5. Step 5: Solve for x
    x = 13,837,641.82/3,172.88
  6. Step 6: Final answer
    x = 4,361.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.