Home / 5,451.88-8,181.89-2,120.65

Finding the Fourth Proportional to 5,451.88, 8,181.89 and 2,120.65

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Solution

The fourth proportional to 5,451.88, 8,181.89 and 2,120.65 is: 3,182.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,451.88 : 8,181.89 = 2,120.65 : x
  2. Step 2: Convert to fraction form
    5,451.88/8,181.89 = 2,120.65/x
  3. Step 3: Cross multiply
    5,451.88x = 8,181.89 × 2,120.65
  4. Step 4: Simplify right side
    5,451.88x = 17,350,925.03
  5. Step 5: Solve for x
    x = 17,350,925.03/5,451.88
  6. Step 6: Final answer
    x = 3,182.56

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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.