Home / 7,171.20-10,742.09-4,242.38

Finding the Fourth Proportional to 7,171.20, 10,742.09 and 4,242.38

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Solution

The fourth proportional to 7,171.20, 10,742.09 and 4,242.38 is: 6,354.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,171.20 : 10,742.09 = 4,242.38 : x
  2. Step 2: Convert to fraction form
    7,171.20/10,742.09 = 4,242.38/x
  3. Step 3: Cross multiply
    7,171.20x = 10,742.09 × 4,242.38
  4. Step 4: Simplify right side
    7,171.20x = 45,571,952.85
  5. Step 5: Solve for x
    x = 45,571,952.85/7,171.20
  6. Step 6: Final answer
    x = 6,354.86

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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.