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Finding the Fourth Proportional to 6,522.78, 9,787.20 and 3,406.30

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Solution

The fourth proportional to 6,522.78, 9,787.20 and 3,406.30 is: 5,111.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,522.78 : 9,787.20 = 3,406.30 : x
  2. Step 2: Convert to fraction form
    6,522.78/9,787.20 = 3,406.30/x
  3. Step 3: Cross multiply
    6,522.78x = 9,787.20 × 3,406.30
  4. Step 4: Simplify right side
    6,522.78x = 33,338,139.36
  5. Step 5: Solve for x
    x = 33,338,139.36/6,522.78
  6. Step 6: Final answer
    x = 5,111.03

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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.