Home / 3,131.68-4,318.73-1,872.53

Finding the Fourth Proportional to 3,131.68, 4,318.73 and 1,872.53

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Solution

The fourth proportional to 3,131.68, 4,318.73 and 1,872.53 is: 2,582.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.68 : 4,318.73 = 1,872.53 : x
  2. Step 2: Convert to fraction form
    3,131.68/4,318.73 = 1,872.53/x
  3. Step 3: Cross multiply
    3,131.68x = 4,318.73 × 1,872.53
  4. Step 4: Simplify right side
    3,131.68x = 8,086,947.29
  5. Step 5: Solve for x
    x = 8,086,947.29/3,131.68
  6. Step 6: Final answer
    x = 2,582.31

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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.