Home / 3,908.55-5,388.21-2,787.57

Finding the Fourth Proportional to 3,908.55, 5,388.21 and 2,787.57

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Solution

The fourth proportional to 3,908.55, 5,388.21 and 2,787.57 is: 3,842.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.55 : 5,388.21 = 2,787.57 : x
  2. Step 2: Convert to fraction form
    3,908.55/5,388.21 = 2,787.57/x
  3. Step 3: Cross multiply
    3,908.55x = 5,388.21 × 2,787.57
  4. Step 4: Simplify right side
    3,908.55x = 15,020,012.55
  5. Step 5: Solve for x
    x = 15,020,012.55/3,908.55
  6. Step 6: Final answer
    x = 3,842.86

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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.