Home / 5,391.80-8,084.20-2,105.22

Finding the Fourth Proportional to 5,391.80, 8,084.20 and 2,105.22

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Solution

The fourth proportional to 5,391.80, 8,084.20 and 2,105.22 is: 3,156.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,391.80 : 8,084.20 = 2,105.22 : x
  2. Step 2: Convert to fraction form
    5,391.80/8,084.20 = 2,105.22/x
  3. Step 3: Cross multiply
    5,391.80x = 8,084.20 × 2,105.22
  4. Step 4: Simplify right side
    5,391.80x = 17,019,019.52
  5. Step 5: Solve for x
    x = 17,019,019.52/5,391.80
  6. Step 6: Final answer
    x = 3,156.46

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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.