Home / 3,131.60-4,321.97-1,872.63

Finding the Fourth Proportional to 3,131.60, 4,321.97 and 1,872.63

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Solution

The fourth proportional to 3,131.60, 4,321.97 and 1,872.63 is: 2,584.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.60 : 4,321.97 = 1,872.63 : x
  2. Step 2: Convert to fraction form
    3,131.60/4,321.97 = 1,872.63/x
  3. Step 3: Cross multiply
    3,131.60x = 4,321.97 × 1,872.63
  4. Step 4: Simplify right side
    3,131.60x = 8,093,441.32
  5. Step 5: Solve for x
    x = 8,093,441.32/3,131.60
  6. Step 6: Final answer
    x = 2,584.45

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1.5x scale

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.