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Finding the Fourth Proportional to 6,808.80, 10,213.90 and 2,128.02

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Solution

The fourth proportional to 6,808.80, 10,213.90 and 2,128.02 is: 3,192.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,808.80 : 10,213.90 = 2,128.02 : x
  2. Step 2: Convert to fraction form
    6,808.80/10,213.90 = 2,128.02/x
  3. Step 3: Cross multiply
    6,808.80x = 10,213.90 × 2,128.02
  4. Step 4: Simplify right side
    6,808.80x = 21,735,383.48
  5. Step 5: Solve for x
    x = 21,735,383.48/6,808.80
  6. Step 6: Final answer
    x = 3,192.25

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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.