Home / 5,311.35-7,960.10-2,187.80

Finding the Fourth Proportional to 5,311.35, 7,960.10 and 2,187.80

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Solution

The fourth proportional to 5,311.35, 7,960.10 and 2,187.80 is: 3,278.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,311.35 : 7,960.10 = 2,187.80 : x
  2. Step 2: Convert to fraction form
    5,311.35/7,960.10 = 2,187.80/x
  3. Step 3: Cross multiply
    5,311.35x = 7,960.10 × 2,187.80
  4. Step 4: Simplify right side
    5,311.35x = 17,415,056.04
  5. Step 5: Solve for x
    x = 17,415,056.04/5,311.35
  6. Step 6: Final answer
    x = 3,278.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.