Home / 2,787.57-3,847.33-2,117.59

Finding the Fourth Proportional to 2,787.57, 3,847.33 and 2,117.59

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Solution

The fourth proportional to 2,787.57, 3,847.33 and 2,117.59 is: 2,922.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.57 : 3,847.33 = 2,117.59 : x
  2. Step 2: Convert to fraction form
    2,787.57/3,847.33 = 2,117.59/x
  3. Step 3: Cross multiply
    2,787.57x = 3,847.33 × 2,117.59
  4. Step 4: Simplify right side
    2,787.57x = 8,147,074.99
  5. Step 5: Solve for x
    x = 8,147,074.99/2,787.57
  6. Step 6: Final answer
    x = 2,922.65

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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.