Home / 5,119.46-7,679.10-1,421.27

Finding the Fourth Proportional to 5,119.46, 7,679.10 and 1,421.27

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Solution

The fourth proportional to 5,119.46, 7,679.10 and 1,421.27 is: 2,131.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119.46 : 7,679.10 = 1,421.27 : x
  2. Step 2: Convert to fraction form
    5,119.46/7,679.10 = 1,421.27/x
  3. Step 3: Cross multiply
    5,119.46x = 7,679.10 × 1,421.27
  4. Step 4: Simplify right side
    5,119.46x = 10,914,074.46
  5. Step 5: Solve for x
    x = 10,914,074.46/5,119.46
  6. Step 6: Final answer
    x = 2,131.88

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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.