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Finding the Fourth Proportional to 7,917.49, 11,871.52 and 2,651.22

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Solution

The fourth proportional to 7,917.49, 11,871.52 and 2,651.22 is: 3,975.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,917.49 : 11,871.52 = 2,651.22 : x
  2. Step 2: Convert to fraction form
    7,917.49/11,871.52 = 2,651.22/x
  3. Step 3: Cross multiply
    7,917.49x = 11,871.52 × 2,651.22
  4. Step 4: Simplify right side
    7,917.49x = 31,474,004.63
  5. Step 5: Solve for x
    x = 31,474,004.63/7,917.49
  6. Step 6: Final answer
    x = 3,975.25

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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.