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Finding the Fourth Proportional to 7,274.87, 10,917.09 and 3,990.27

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Solution

The fourth proportional to 7,274.87, 10,917.09 and 3,990.27 is: 5,988.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,274.87 : 10,917.09 = 3,990.27 : x
  2. Step 2: Convert to fraction form
    7,274.87/10,917.09 = 3,990.27/x
  3. Step 3: Cross multiply
    7,274.87x = 10,917.09 × 3,990.27
  4. Step 4: Simplify right side
    7,274.87x = 43,562,136.71
  5. Step 5: Solve for x
    x = 43,562,136.71/7,274.87
  6. Step 6: Final answer
    x = 5,988.03

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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.