Home / 3,391.17-5,085.38-2,156.90

Finding the Fourth Proportional to 3,391.17, 5,085.38 and 2,156.90

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Solution

The fourth proportional to 3,391.17, 5,085.38 and 2,156.90 is: 3,234.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.17 : 5,085.38 = 2,156.90 : x
  2. Step 2: Convert to fraction form
    3,391.17/5,085.38 = 2,156.90/x
  3. Step 3: Cross multiply
    3,391.17x = 5,085.38 × 2,156.90
  4. Step 4: Simplify right side
    3,391.17x = 10,968,636.09
  5. Step 5: Solve for x
    x = 10,968,636.09/3,391.17
  6. Step 6: Final answer
    x = 3,234.47

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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.