Home / 7,165.38-10,742.49-3,415.21

Finding the Fourth Proportional to 7,165.38, 10,742.49 and 3,415.21

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Solution

The fourth proportional to 7,165.38, 10,742.49 and 3,415.21 is: 5,120.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,165.38 : 10,742.49 = 3,415.21 : x
  2. Step 2: Convert to fraction form
    7,165.38/10,742.49 = 3,415.21/x
  3. Step 3: Cross multiply
    7,165.38x = 10,742.49 × 3,415.21
  4. Step 4: Simplify right side
    7,165.38x = 36,687,805.56
  5. Step 5: Solve for x
    x = 36,687,805.56/7,165.38
  6. Step 6: Final answer
    x = 5,120.15

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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.