Home / 7,965.80-11,946.27-2,121.65

Finding the Fourth Proportional to 7,965.80, 11,946.27 and 2,121.65

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Solution

The fourth proportional to 7,965.80, 11,946.27 and 2,121.65 is: 3,181.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,965.80 : 11,946.27 = 2,121.65 : x
  2. Step 2: Convert to fraction form
    7,965.80/11,946.27 = 2,121.65/x
  3. Step 3: Cross multiply
    7,965.80x = 11,946.27 × 2,121.65
  4. Step 4: Simplify right side
    7,965.80x = 25,345,803.75
  5. Step 5: Solve for x
    x = 25,345,803.75/7,965.80
  6. Step 6: Final answer
    x = 3,181.83

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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.