Home / 2,126.82-3,190.20-1,260.50

Finding the Fourth Proportional to 2,126.82, 3,190.20 and 1,260.50

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Solution

The fourth proportional to 2,126.82, 3,190.20 and 1,260.50 is: 1,890.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.82 : 3,190.20 = 1,260.50 : x
  2. Step 2: Convert to fraction form
    2,126.82/3,190.20 = 1,260.50/x
  3. Step 3: Cross multiply
    2,126.82x = 3,190.20 × 1,260.50
  4. Step 4: Simplify right side
    2,126.82x = 4,021,247.10
  5. Step 5: Solve for x
    x = 4,021,247.10/2,126.82
  6. Step 6: Final answer
    x = 1,890.73

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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.