Home / 6,840.21-9,439.29-3,855.99

Finding the Fourth Proportional to 6,840.21, 9,439.29 and 3,855.99

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Solution

The fourth proportional to 6,840.21, 9,439.29 and 3,855.99 is: 5,321.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,840.21 : 9,439.29 = 3,855.99 : x
  2. Step 2: Convert to fraction form
    6,840.21/9,439.29 = 3,855.99/x
  3. Step 3: Cross multiply
    6,840.21x = 9,439.29 × 3,855.99
  4. Step 4: Simplify right side
    6,840.21x = 36,397,807.85
  5. Step 5: Solve for x
    x = 36,397,807.85/6,840.21
  6. Step 6: Final answer
    x = 5,321.15

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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.