Home / 2,131.13-2,940.96-1,247.69

Finding the Fourth Proportional to 2,131.13, 2,940.96 and 1,247.69

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Solution

The fourth proportional to 2,131.13, 2,940.96 and 1,247.69 is: 1,721.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.13 : 2,940.96 = 1,247.69 : x
  2. Step 2: Convert to fraction form
    2,131.13/2,940.96 = 1,247.69/x
  3. Step 3: Cross multiply
    2,131.13x = 2,940.96 × 1,247.69
  4. Step 4: Simplify right side
    2,131.13x = 3,669,391.68
  5. Step 5: Solve for x
    x = 3,669,391.68/2,131.13
  6. Step 6: Final answer
    x = 1,721.81

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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.