Home / 3,664.50-5,055.78-2,172.90

Finding the Fourth Proportional to 3,664.50, 5,055.78 and 2,172.90

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Solution

The fourth proportional to 3,664.50, 5,055.78 and 2,172.90 is: 2,997.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,664.50 : 5,055.78 = 2,172.90 : x
  2. Step 2: Convert to fraction form
    3,664.50/5,055.78 = 2,172.90/x
  3. Step 3: Cross multiply
    3,664.50x = 5,055.78 × 2,172.90
  4. Step 4: Simplify right side
    3,664.50x = 10,985,704.36
  5. Step 5: Solve for x
    x = 10,985,704.36/3,664.50
  6. Step 6: Final answer
    x = 2,997.87

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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.