Home / 3,678.36-5,074.70-2,105.61

Finding the Fourth Proportional to 3,678.36, 5,074.70 and 2,105.61

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Solution

The fourth proportional to 3,678.36, 5,074.70 and 2,105.61 is: 2,904.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.36 : 5,074.70 = 2,105.61 : x
  2. Step 2: Convert to fraction form
    3,678.36/5,074.70 = 2,105.61/x
  3. Step 3: Cross multiply
    3,678.36x = 5,074.70 × 2,105.61
  4. Step 4: Simplify right side
    3,678.36x = 10,685,328.54
  5. Step 5: Solve for x
    x = 10,685,328.54/3,678.36
  6. Step 6: Final answer
    x = 2,904.92

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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.