Home / 3,878.04-5,351.70-2,109.61

Finding the Fourth Proportional to 3,878.04, 5,351.70 and 2,109.61

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Solution

The fourth proportional to 3,878.04, 5,351.70 and 2,109.61 is: 2,911.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.04 : 5,351.70 = 2,109.61 : x
  2. Step 2: Convert to fraction form
    3,878.04/5,351.70 = 2,109.61/x
  3. Step 3: Cross multiply
    3,878.04x = 5,351.70 × 2,109.61
  4. Step 4: Simplify right side
    3,878.04x = 11,289,999.84
  5. Step 5: Solve for x
    x = 11,289,999.84/3,878.04
  6. Step 6: Final answer
    x = 2,911.26

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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.