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Finding the Fourth Proportional to 18,379.10, 27,556.81 and 7,855.99

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Solution

The fourth proportional to 18,379.10, 27,556.81 and 7,855.99 is: 11,778.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,379.10 : 27,556.81 = 7,855.99 : x
  2. Step 2: Convert to fraction form
    18,379.10/27,556.81 = 7,855.99/x
  3. Step 3: Cross multiply
    18,379.10x = 27,556.81 × 7,855.99
  4. Step 4: Simplify right side
    18,379.10x = 216,485,935.26
  5. Step 5: Solve for x
    x = 216,485,935.26/18,379.10
  6. Step 6: Final answer
    x = 11,778.92

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1.5x scale

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.