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Finding the Fourth Proportional to 7,485.81, 11,218.92 and 3,786.03

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Solution

The fourth proportional to 7,485.81, 11,218.92 and 3,786.03 is: 5,674.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,485.81 : 11,218.92 = 3,786.03 : x
  2. Step 2: Convert to fraction form
    7,485.81/11,218.92 = 3,786.03/x
  3. Step 3: Cross multiply
    7,485.81x = 11,218.92 × 3,786.03
  4. Step 4: Simplify right side
    7,485.81x = 42,475,167.69
  5. Step 5: Solve for x
    x = 42,475,167.69/7,485.81
  6. Step 6: Final answer
    x = 5,674.09

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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.