Home / 3,880.87-5,355.59-2,112.48

Finding the Fourth Proportional to 3,880.87, 5,355.59 and 2,112.48

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Solution

The fourth proportional to 3,880.87, 5,355.59 and 2,112.48 is: 2,915.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,880.87 : 5,355.59 = 2,112.48 : x
  2. Step 2: Convert to fraction form
    3,880.87/5,355.59 = 2,112.48/x
  3. Step 3: Cross multiply
    3,880.87x = 5,355.59 × 2,112.48
  4. Step 4: Simplify right side
    3,880.87x = 11,313,539.42
  5. Step 5: Solve for x
    x = 11,313,539.42/3,880.87
  6. Step 6: Final answer
    x = 2,915.21

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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.