Home / 2,115.81-3,172.23-1,142.55

Finding the Fourth Proportional to 2,115.81, 3,172.23 and 1,142.55

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Solution

The fourth proportional to 2,115.81, 3,172.23 and 1,142.55 is: 1,713.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.81 : 3,172.23 = 1,142.55 : x
  2. Step 2: Convert to fraction form
    2,115.81/3,172.23 = 1,142.55/x
  3. Step 3: Cross multiply
    2,115.81x = 3,172.23 × 1,142.55
  4. Step 4: Simplify right side
    2,115.81x = 3,624,431.39
  5. Step 5: Solve for x
    x = 3,624,431.39/2,115.81
  6. Step 6: Final answer
    x = 1,713.02

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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.