Home / 3,878.65-5,352.75-2,110.21

Finding the Fourth Proportional to 3,878.65, 5,352.75 and 2,110.21

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Solution

The fourth proportional to 3,878.65, 5,352.75 and 2,110.21 is: 2,912.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.65 : 5,352.75 = 2,110.21 : x
  2. Step 2: Convert to fraction form
    3,878.65/5,352.75 = 2,110.21/x
  3. Step 3: Cross multiply
    3,878.65x = 5,352.75 × 2,110.21
  4. Step 4: Simplify right side
    3,878.65x = 11,295,426.58
  5. Step 5: Solve for x
    x = 11,295,426.58/3,878.65
  6. Step 6: Final answer
    x = 2,912.21

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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.