Home / 3,172.89-4,378.07-1,993.13

Finding the Fourth Proportional to 3,172.89, 4,378.07 and 1,993.13

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Solution

The fourth proportional to 3,172.89, 4,378.07 and 1,993.13 is: 2,750.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.89 : 4,378.07 = 1,993.13 : x
  2. Step 2: Convert to fraction form
    3,172.89/4,378.07 = 1,993.13/x
  3. Step 3: Cross multiply
    3,172.89x = 4,378.07 × 1,993.13
  4. Step 4: Simplify right side
    3,172.89x = 8,726,035.79
  5. Step 5: Solve for x
    x = 8,726,035.79/3,172.89
  6. Step 6: Final answer
    x = 2,750.19

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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.