Home / 2,823.18-3,893.68-1,986.65

Finding the Fourth Proportional to 2,823.18, 3,893.68 and 1,986.65

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Solution

The fourth proportional to 2,823.18, 3,893.68 and 1,986.65 is: 2,739.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,823.18 : 3,893.68 = 1,986.65 : x
  2. Step 2: Convert to fraction form
    2,823.18/3,893.68 = 1,986.65/x
  3. Step 3: Cross multiply
    2,823.18x = 3,893.68 × 1,986.65
  4. Step 4: Simplify right side
    2,823.18x = 7,735,376.99
  5. Step 5: Solve for x
    x = 7,735,376.99/2,823.18
  6. Step 6: Final answer
    x = 2,739.96

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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.