Home / 2,111.11-2,912.11-1,271.23

Finding the Fourth Proportional to 2,111.11, 2,912.11 and 1,271.23

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Solution

The fourth proportional to 2,111.11, 2,912.11 and 1,271.23 is: 1,753.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,111.11 : 2,912.11 = 1,271.23 : x
  2. Step 2: Convert to fraction form
    2,111.11/2,912.11 = 1,271.23/x
  3. Step 3: Cross multiply
    2,111.11x = 2,912.11 × 1,271.23
  4. Step 4: Simplify right side
    2,111.11x = 3,701,961.60
  5. Step 5: Solve for x
    x = 3,701,961.60/2,111.11
  6. Step 6: Final answer
    x = 1,753.56

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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.