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Finding the Fourth Proportional to 7,914.96, 11,872.32 and 2,720.88

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Solution

The fourth proportional to 7,914.96, 11,872.32 and 2,720.88 is: 4,081.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,914.96 : 11,872.32 = 2,720.88 : x
  2. Step 2: Convert to fraction form
    7,914.96/11,872.32 = 2,720.88/x
  3. Step 3: Cross multiply
    7,914.96x = 11,872.32 × 2,720.88
  4. Step 4: Simplify right side
    7,914.96x = 32,303,158.04
  5. Step 5: Solve for x
    x = 32,303,158.04/7,914.96
  6. Step 6: Final answer
    x = 4,081.28

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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.