Home / 2,581.85-3,868.20-2,117.10

Finding the Fourth Proportional to 2,581.85, 3,868.20 and 2,117.10

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Solution

The fourth proportional to 2,581.85, 3,868.20 and 2,117.10 is: 3,171.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,581.85 : 3,868.20 = 2,117.10 : x
  2. Step 2: Convert to fraction form
    2,581.85/3,868.20 = 2,117.10/x
  3. Step 3: Cross multiply
    2,581.85x = 3,868.20 × 2,117.10
  4. Step 4: Simplify right side
    2,581.85x = 8,189,366.22
  5. Step 5: Solve for x
    x = 8,189,366.22/2,581.85
  6. Step 6: Final answer
    x = 3,171.90

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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.