Home / 7,238.12-10,857.29-2,311.90

Finding the Fourth Proportional to 7,238.12, 10,857.29 and 2,311.90

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Solution

The fourth proportional to 7,238.12, 10,857.29 and 2,311.90 is: 3,467.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,238.12 : 10,857.29 = 2,311.90 : x
  2. Step 2: Convert to fraction form
    7,238.12/10,857.29 = 2,311.90/x
  3. Step 3: Cross multiply
    7,238.12x = 10,857.29 × 2,311.90
  4. Step 4: Simplify right side
    7,238.12x = 25,100,968.75
  5. Step 5: Solve for x
    x = 25,100,968.75/7,238.12
  6. Step 6: Final answer
    x = 3,467.89

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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.