Home / 2,816.36-3,884.21-2,109.86

Finding the Fourth Proportional to 2,816.36, 3,884.21 and 2,109.86

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Solution

The fourth proportional to 2,816.36, 3,884.21 and 2,109.86 is: 2,909.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816.36 : 3,884.21 = 2,109.86 : x
  2. Step 2: Convert to fraction form
    2,816.36/3,884.21 = 2,109.86/x
  3. Step 3: Cross multiply
    2,816.36x = 3,884.21 × 2,109.86
  4. Step 4: Simplify right side
    2,816.36x = 8,195,154.30
  5. Step 5: Solve for x
    x = 8,195,154.30/2,816.36
  6. Step 6: Final answer
    x = 2,909.84

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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.