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Finding the Fourth Proportional to 7,990.65, 11,985.90 and 2,067.02

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Solution

The fourth proportional to 7,990.65, 11,985.90 and 2,067.02 is: 3,100.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.65 : 11,985.90 = 2,067.02 : x
  2. Step 2: Convert to fraction form
    7,990.65/11,985.90 = 2,067.02/x
  3. Step 3: Cross multiply
    7,990.65x = 11,985.90 × 2,067.02
  4. Step 4: Simplify right side
    7,990.65x = 24,775,095.02
  5. Step 5: Solve for x
    x = 24,775,095.02/7,990.65
  6. Step 6: Final answer
    x = 3,100.51

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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.