Home / 3,783.85-5,221.60-2,105.19

Finding the Fourth Proportional to 3,783.85, 5,221.60 and 2,105.19

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Solution

The fourth proportional to 3,783.85, 5,221.60 and 2,105.19 is: 2,905.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,783.85 : 5,221.60 = 2,105.19 : x
  2. Step 2: Convert to fraction form
    3,783.85/5,221.60 = 2,105.19/x
  3. Step 3: Cross multiply
    3,783.85x = 5,221.60 × 2,105.19
  4. Step 4: Simplify right side
    3,783.85x = 10,992,454.84
  5. Step 5: Solve for x
    x = 10,992,454.84/3,783.85
  6. Step 6: Final answer
    x = 2,905.10

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Find fourth proportional to 1,891.92, 2,610.80 and 1,052.60
Half scale
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Double scale
Find fourth proportional to 3,784.85, 5,222.98 and 2,106.19
Similar ratio
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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.