Home / 3,878.41-5,352.09-2,109.97

Finding the Fourth Proportional to 3,878.41, 5,352.09 and 2,109.97

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Solution

The fourth proportional to 3,878.41, 5,352.09 and 2,109.97 is: 2,911.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.41 : 5,352.09 = 2,109.97 : x
  2. Step 2: Convert to fraction form
    3,878.41/5,352.09 = 2,109.97/x
  3. Step 3: Cross multiply
    3,878.41x = 5,352.09 × 2,109.97
  4. Step 4: Simplify right side
    3,878.41x = 11,292,749.34
  5. Step 5: Solve for x
    x = 11,292,749.34/3,878.41
  6. Step 6: Final answer
    x = 2,911.70

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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.