Home / 3,811.35-5,259.18-2,109.62

Finding the Fourth Proportional to 3,811.35, 5,259.18 and 2,109.62

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Solution

The fourth proportional to 3,811.35, 5,259.18 and 2,109.62 is: 2,911.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.35 : 5,259.18 = 2,109.62 : x
  2. Step 2: Convert to fraction form
    3,811.35/5,259.18 = 2,109.62/x
  3. Step 3: Cross multiply
    3,811.35x = 5,259.18 × 2,109.62
  4. Step 4: Simplify right side
    3,811.35x = 11,094,845.02
  5. Step 5: Solve for x
    x = 11,094,845.02/3,811.35
  6. Step 6: Final answer
    x = 2,911.00

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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.