Home / 3,880.91-5,355.66-2,112.51

Finding the Fourth Proportional to 3,880.91, 5,355.66 and 2,112.51

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Solution

The fourth proportional to 3,880.91, 5,355.66 and 2,112.51 is: 2,915.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,880.91 : 5,355.66 = 2,112.51 : x
  2. Step 2: Convert to fraction form
    3,880.91/5,355.66 = 2,112.51/x
  3. Step 3: Cross multiply
    3,880.91x = 5,355.66 × 2,112.51
  4. Step 4: Simplify right side
    3,880.91x = 11,313,885.31
  5. Step 5: Solve for x
    x = 11,313,885.31/3,880.91
  6. Step 6: Final answer
    x = 2,915.27

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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.