Home / 5,420.36-8,132.50-2,131.62

Finding the Fourth Proportional to 5,420.36, 8,132.50 and 2,131.62

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Solution

The fourth proportional to 5,420.36, 8,132.50 and 2,131.62 is: 3,198.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.36 : 8,132.50 = 2,131.62 : x
  2. Step 2: Convert to fraction form
    5,420.36/8,132.50 = 2,131.62/x
  3. Step 3: Cross multiply
    5,420.36x = 8,132.50 × 2,131.62
  4. Step 4: Simplify right side
    5,420.36x = 17,335,399.65
  5. Step 5: Solve for x
    x = 17,335,399.65/5,420.36
  6. Step 6: Final answer
    x = 3,198.20

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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.