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Finding the Fourth Proportional to 11,992.01, 17,993.21 and 6,438.87

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Solution

The fourth proportional to 11,992.01, 17,993.21 and 6,438.87 is: 9,661.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,992.01 : 17,993.21 = 6,438.87 : x
  2. Step 2: Convert to fraction form
    11,992.01/17,993.21 = 6,438.87/x
  3. Step 3: Cross multiply
    11,992.01x = 17,993.21 × 6,438.87
  4. Step 4: Simplify right side
    11,992.01x = 115,855,907.88
  5. Step 5: Solve for x
    x = 115,855,907.88/11,992.01
  6. Step 6: Final answer
    x = 9,661.10

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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.