Home / 3,850.81-5,314.17-2,172.30

Finding the Fourth Proportional to 3,850.81, 5,314.17 and 2,172.30

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Solution

The fourth proportional to 3,850.81, 5,314.17 and 2,172.30 is: 2,997.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,850.81 : 5,314.17 = 2,172.30 : x
  2. Step 2: Convert to fraction form
    3,850.81/5,314.17 = 2,172.30/x
  3. Step 3: Cross multiply
    3,850.81x = 5,314.17 × 2,172.30
  4. Step 4: Simplify right side
    3,850.81x = 11,543,971.49
  5. Step 5: Solve for x
    x = 11,543,971.49/3,850.81
  6. Step 6: Final answer
    x = 2,997.80

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1.5x scale

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.