Home / 3,880.86-5,355.59-2,112.47

Finding the Fourth Proportional to 3,880.86, 5,355.59 and 2,112.47

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Solution

The fourth proportional to 3,880.86, 5,355.59 and 2,112.47 is: 2,915.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,880.86 : 5,355.59 = 2,112.47 : x
  2. Step 2: Convert to fraction form
    3,880.86/5,355.59 = 2,112.47/x
  3. Step 3: Cross multiply
    3,880.86x = 5,355.59 × 2,112.47
  4. Step 4: Simplify right side
    3,880.86x = 11,313,523.21
  5. Step 5: Solve for x
    x = 11,313,523.21/3,880.86
  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.