Home / 5,421.20-8,131.80-2,132.50

Finding the Fourth Proportional to 5,421.20, 8,131.80 and 2,132.50

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Solution

The fourth proportional to 5,421.20, 8,131.80 and 2,132.50 is: 3,198.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.20 : 8,131.80 = 2,132.50 : x
  2. Step 2: Convert to fraction form
    5,421.20/8,131.80 = 2,132.50/x
  3. Step 3: Cross multiply
    5,421.20x = 8,131.80 × 2,132.50
  4. Step 4: Simplify right side
    5,421.20x = 17,341,063.50
  5. Step 5: Solve for x
    x = 17,341,063.50/5,421.20
  6. Step 6: Final answer
    x = 3,198.75

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1.5x scale

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.