Home / 2,107.55-3,161.33-1,247.33

Finding the Fourth Proportional to 2,107.55, 3,161.33 and 1,247.33

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Solution

The fourth proportional to 2,107.55, 3,161.33 and 1,247.33 is: 1,871.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.55 : 3,161.33 = 1,247.33 : x
  2. Step 2: Convert to fraction form
    2,107.55/3,161.33 = 1,247.33/x
  3. Step 3: Cross multiply
    2,107.55x = 3,161.33 × 1,247.33
  4. Step 4: Simplify right side
    2,107.55x = 3,943,228.09
  5. Step 5: Solve for x
    x = 3,943,228.09/2,107.55
  6. Step 6: Final answer
    x = 1,871.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.