Home / 2,131.11-2,940.84-1,247.00

Finding the Fourth Proportional to 2,131.11, 2,940.84 and 1,247.00

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Solution

The fourth proportional to 2,131.11, 2,940.84 and 1,247.00 is: 1,720.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.11 : 2,940.84 = 1,247.00 : x
  2. Step 2: Convert to fraction form
    2,131.11/2,940.84 = 1,247.00/x
  3. Step 3: Cross multiply
    2,131.11x = 2,940.84 × 1,247.00
  4. Step 4: Simplify right side
    2,131.11x = 3,667,212.78
  5. Step 5: Solve for x
    x = 3,667,212.78/2,131.11
  6. Step 6: Final answer
    x = 1,720.80

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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.