Home / 2,129.24-3,195.86-1,309.11

Finding the Fourth Proportional to 2,129.24, 3,195.86 and 1,309.11

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Solution

The fourth proportional to 2,129.24, 3,195.86 and 1,309.11 is: 1,964.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.24 : 3,195.86 = 1,309.11 : x
  2. Step 2: Convert to fraction form
    2,129.24/3,195.86 = 1,309.11/x
  3. Step 3: Cross multiply
    2,129.24x = 3,195.86 × 1,309.11
  4. Step 4: Simplify right side
    2,129.24x = 4,183,725.74
  5. Step 5: Solve for x
    x = 4,183,725.74/2,129.24
  6. Step 6: Final answer
    x = 1,964.90

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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.