Home / 5,160.10-7,121.06-2,891.61

Finding the Fourth Proportional to 5,160.10, 7,121.06 and 2,891.61

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Solution

The fourth proportional to 5,160.10, 7,121.06 and 2,891.61 is: 3,990.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.10 : 7,121.06 = 2,891.61 : x
  2. Step 2: Convert to fraction form
    5,160.10/7,121.06 = 2,891.61/x
  3. Step 3: Cross multiply
    5,160.10x = 7,121.06 × 2,891.61
  4. Step 4: Simplify right side
    5,160.10x = 20,591,351.40
  5. Step 5: Solve for x
    x = 20,591,351.40/5,160.10
  6. Step 6: Final answer
    x = 3,990.49

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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.