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Finding the Fourth Proportional to 7,993.65, 11,990.49 and 2,798.31

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Solution

The fourth proportional to 7,993.65, 11,990.49 and 2,798.31 is: 4,197.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,993.65 : 11,990.49 = 2,798.31 : x
  2. Step 2: Convert to fraction form
    7,993.65/11,990.49 = 2,798.31/x
  3. Step 3: Cross multiply
    7,993.65x = 11,990.49 × 2,798.31
  4. Step 4: Simplify right side
    7,993.65x = 33,553,108.07
  5. Step 5: Solve for x
    x = 33,553,108.07/7,993.65
  6. Step 6: Final answer
    x = 4,197.47

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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.