Home / 3,122.21-4,310.42-2,166.50

Finding the Fourth Proportional to 3,122.21, 4,310.42 and 2,166.50

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Solution

The fourth proportional to 3,122.21, 4,310.42 and 2,166.50 is: 2,990.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.21 : 4,310.42 = 2,166.50 : x
  2. Step 2: Convert to fraction form
    3,122.21/4,310.42 = 2,166.50/x
  3. Step 3: Cross multiply
    3,122.21x = 4,310.42 × 2,166.50
  4. Step 4: Simplify right side
    3,122.21x = 9,338,514.10
  5. Step 5: Solve for x
    x = 9,338,514.10/3,122.21
  6. Step 6: Final answer
    x = 2,990.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.