Home / 3,961.21-5,459.95-2,811.80

Finding the Fourth Proportional to 3,961.21, 5,459.95 and 2,811.80

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Solution

The fourth proportional to 3,961.21, 5,459.95 and 2,811.80 is: 3,875.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,961.21 : 5,459.95 = 2,811.80 : x
  2. Step 2: Convert to fraction form
    3,961.21/5,459.95 = 2,811.80/x
  3. Step 3: Cross multiply
    3,961.21x = 5,459.95 × 2,811.80
  4. Step 4: Simplify right side
    3,961.21x = 15,352,288.76
  5. Step 5: Solve for x
    x = 15,352,288.76/3,961.21
  6. Step 6: Final answer
    x = 3,875.66

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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.