Home / 3,880.20-5,354.52-2,111.82

Finding the Fourth Proportional to 3,880.20, 5,354.52 and 2,111.82

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Solution

The fourth proportional to 3,880.20, 5,354.52 and 2,111.82 is: 2,914.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,880.20 : 5,354.52 = 2,111.82 : x
  2. Step 2: Convert to fraction form
    3,880.20/5,354.52 = 2,111.82/x
  3. Step 3: Cross multiply
    3,880.20x = 5,354.52 × 2,111.82
  4. Step 4: Simplify right side
    3,880.20x = 11,307,755.65
  5. Step 5: Solve for x
    x = 11,307,755.65/3,880.20
  6. Step 6: Final answer
    x = 2,914.22

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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.