Home / 5,391.20-8,082.72-2,103.84

Finding the Fourth Proportional to 5,391.20, 8,082.72 and 2,103.84

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Solution

The fourth proportional to 5,391.20, 8,082.72 and 2,103.84 is: 3,154.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,391.20 : 8,082.72 = 2,103.84 : x
  2. Step 2: Convert to fraction form
    5,391.20/8,082.72 = 2,103.84/x
  3. Step 3: Cross multiply
    5,391.20x = 8,082.72 × 2,103.84
  4. Step 4: Simplify right side
    5,391.20x = 17,004,749.64
  5. Step 5: Solve for x
    x = 17,004,749.64/5,391.20
  6. Step 6: Final answer
    x = 3,154.17

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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.