Home / 3,518.65-5,275.36-2,131.72

Finding the Fourth Proportional to 3,518.65, 5,275.36 and 2,131.72

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Solution

The fourth proportional to 3,518.65, 5,275.36 and 2,131.72 is: 3,195.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,518.65 : 5,275.36 = 2,131.72 : x
  2. Step 2: Convert to fraction form
    3,518.65/5,275.36 = 2,131.72/x
  3. Step 3: Cross multiply
    3,518.65x = 5,275.36 × 2,131.72
  4. Step 4: Simplify right side
    3,518.65x = 11,245,571.90
  5. Step 5: Solve for x
    x = 11,245,571.90/3,518.65
  6. Step 6: Final answer
    x = 3,195.99

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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.