Home / 2,115-3,173.94-1,271.43

Finding the Fourth Proportional to 2,115, 3,173.94 and 1,271.43

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Solution

The fourth proportional to 2,115, 3,173.94 and 1,271.43 is: 1,908.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115 : 3,173.94 = 1,271.43 : x
  2. Step 2: Convert to fraction form
    2,115/3,173.94 = 1,271.43/x
  3. Step 3: Cross multiply
    2,115x = 3,173.94 × 1,271.43
  4. Step 4: Simplify right side
    2,115x = 4,035,442.53
  5. Step 5: Solve for x
    x = 4,035,442.53/2,115
  6. Step 6: Final answer
    x = 1,908.01

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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.