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Finding the Fourth Proportional to 6,551.40, 9,812.70 and 3,949.80

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Solution

The fourth proportional to 6,551.40, 9,812.70 and 3,949.80 is: 5,916.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,551.40 : 9,812.70 = 3,949.80 : x
  2. Step 2: Convert to fraction form
    6,551.40/9,812.70 = 3,949.80/x
  3. Step 3: Cross multiply
    6,551.40x = 9,812.70 × 3,949.80
  4. Step 4: Simplify right side
    6,551.40x = 38,758,202.46
  5. Step 5: Solve for x
    x = 38,758,202.46/6,551.40
  6. Step 6: Final answer
    x = 5,916.02

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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.