Home / 2,631.29-3,937.19-2,109.70

Finding the Fourth Proportional to 2,631.29, 3,937.19 and 2,109.70

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Solution

The fourth proportional to 2,631.29, 3,937.19 and 2,109.70 is: 3,156.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,631.29 : 3,937.19 = 2,109.70 : x
  2. Step 2: Convert to fraction form
    2,631.29/3,937.19 = 2,109.70/x
  3. Step 3: Cross multiply
    2,631.29x = 3,937.19 × 2,109.70
  4. Step 4: Simplify right side
    2,631.29x = 8,306,289.74
  5. Step 5: Solve for x
    x = 8,306,289.74/2,631.29
  6. Step 6: Final answer
    x = 3,156.74

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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.