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Finding the Fourth Proportional to 7,919.29, 11,871.08 and 4,410.91

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Solution

The fourth proportional to 7,919.29, 11,871.08 and 4,410.91 is: 6,611.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.29 : 11,871.08 = 4,410.91 : x
  2. Step 2: Convert to fraction form
    7,919.29/11,871.08 = 4,410.91/x
  3. Step 3: Cross multiply
    7,919.29x = 11,871.08 × 4,410.91
  4. Step 4: Simplify right side
    7,919.29x = 52,362,220.44
  5. Step 5: Solve for x
    x = 52,362,220.44/7,919.29
  6. Step 6: Final answer
    x = 6,611.98

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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.