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Finding the Fourth Proportional to 7,874.03, 11,811.05 and 2,679.91

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Solution

The fourth proportional to 7,874.03, 11,811.05 and 2,679.91 is: 4,019.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,874.03 : 11,811.05 = 2,679.91 : x
  2. Step 2: Convert to fraction form
    7,874.03/11,811.05 = 2,679.91/x
  3. Step 3: Cross multiply
    7,874.03x = 11,811.05 × 2,679.91
  4. Step 4: Simplify right side
    7,874.03x = 31,652,551.01
  5. Step 5: Solve for x
    x = 31,652,551.01/7,874.03
  6. Step 6: Final answer
    x = 4,019.87

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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.