Home / 3,783.64-5,221.40-2,105.02

Finding the Fourth Proportional to 3,783.64, 5,221.40 and 2,105.02

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Solution

The fourth proportional to 3,783.64, 5,221.40 and 2,105.02 is: 2,904.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,783.64 : 5,221.40 = 2,105.02 : x
  2. Step 2: Convert to fraction form
    3,783.64/5,221.40 = 2,105.02/x
  3. Step 3: Cross multiply
    3,783.64x = 5,221.40 × 2,105.02
  4. Step 4: Simplify right side
    3,783.64x = 10,991,151.43
  5. Step 5: Solve for x
    x = 10,991,151.43/3,783.64
  6. Step 6: Final answer
    x = 2,904.91

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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.