Home / 2,630.55-3,936.70-2,109.31

Finding the Fourth Proportional to 2,630.55, 3,936.70 and 2,109.31

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Solution

The fourth proportional to 2,630.55, 3,936.70 and 2,109.31 is: 3,156.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,630.55 : 3,936.70 = 2,109.31 : x
  2. Step 2: Convert to fraction form
    2,630.55/3,936.70 = 2,109.31/x
  3. Step 3: Cross multiply
    2,630.55x = 3,936.70 × 2,109.31
  4. Step 4: Simplify right side
    2,630.55x = 8,303,720.68
  5. Step 5: Solve for x
    x = 8,303,720.68/2,630.55
  6. Step 6: Final answer
    x = 3,156.65

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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.