Home / 7,438.38-11,157.56-2,821.38

Finding the Fourth Proportional to 7,438.38, 11,157.56 and 2,821.38

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Solution

The fourth proportional to 7,438.38, 11,157.56 and 2,821.38 is: 4,232.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,438.38 : 11,157.56 = 2,821.38 : x
  2. Step 2: Convert to fraction form
    7,438.38/11,157.56 = 2,821.38/x
  3. Step 3: Cross multiply
    7,438.38x = 11,157.56 × 2,821.38
  4. Step 4: Simplify right side
    7,438.38x = 31,479,716.63
  5. Step 5: Solve for x
    x = 31,479,716.63/7,438.38
  6. Step 6: Final answer
    x = 4,232.07

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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.