Home / 2,986.73-4,122.82-1,991.65

Finding the Fourth Proportional to 2,986.73, 4,122.82 and 1,991.65

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Solution

The fourth proportional to 2,986.73, 4,122.82 and 1,991.65 is: 2,749.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.73 : 4,122.82 = 1,991.65 : x
  2. Step 2: Convert to fraction form
    2,986.73/4,122.82 = 1,991.65/x
  3. Step 3: Cross multiply
    2,986.73x = 4,122.82 × 1,991.65
  4. Step 4: Simplify right side
    2,986.73x = 8,211,193.84
  5. Step 5: Solve for x
    x = 8,211,193.84/2,986.73
  6. Step 6: Final answer
    x = 2,749.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.