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Finding the Fourth Proportional to 7,617.15, 11,418.44 and 3,719.43

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Solution

The fourth proportional to 7,617.15, 11,418.44 and 3,719.43 is: 5,575.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,617.15 : 11,418.44 = 3,719.43 : x
  2. Step 2: Convert to fraction form
    7,617.15/11,418.44 = 3,719.43/x
  3. Step 3: Cross multiply
    7,617.15x = 11,418.44 × 3,719.43
  4. Step 4: Simplify right side
    7,617.15x = 42,470,069.69
  5. Step 5: Solve for x
    x = 42,470,069.69/7,617.15
  6. Step 6: Final answer
    x = 5,575.59

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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.