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Finding the Fourth Proportional to 6,640.20, 9,971.70 and 3,677.40

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Solution

The fourth proportional to 6,640.20, 9,971.70 and 3,677.40 is: 5,522.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.20 : 9,971.70 = 3,677.40 : x
  2. Step 2: Convert to fraction form
    6,640.20/9,971.70 = 3,677.40/x
  3. Step 3: Cross multiply
    6,640.20x = 9,971.70 × 3,677.40
  4. Step 4: Simplify right side
    6,640.20x = 36,669,929.58
  5. Step 5: Solve for x
    x = 36,669,929.58/6,640.20
  6. Step 6: Final answer
    x = 5,522.41

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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.