Home / 3,131.70-4,321.46-1,872.51

Finding the Fourth Proportional to 3,131.70, 4,321.46 and 1,872.51

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Solution

The fourth proportional to 3,131.70, 4,321.46 and 1,872.51 is: 2,583.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.70 : 4,321.46 = 1,872.51 : x
  2. Step 2: Convert to fraction form
    3,131.70/4,321.46 = 1,872.51/x
  3. Step 3: Cross multiply
    3,131.70x = 4,321.46 × 1,872.51
  4. Step 4: Simplify right side
    3,131.70x = 8,091,967.70
  5. Step 5: Solve for x
    x = 8,091,967.70/3,131.70
  6. Step 6: Final answer
    x = 2,583.89

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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.