Home / 2,115.38-3,173.18-1,127.79

Finding the Fourth Proportional to 2,115.38, 3,173.18 and 1,127.79

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Solution

The fourth proportional to 2,115.38, 3,173.18 and 1,127.79 is: 1,691.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.38 : 3,173.18 = 1,127.79 : x
  2. Step 2: Convert to fraction form
    2,115.38/3,173.18 = 1,127.79/x
  3. Step 3: Cross multiply
    2,115.38x = 3,173.18 × 1,127.79
  4. Step 4: Simplify right side
    2,115.38x = 3,578,675.03
  5. Step 5: Solve for x
    x = 3,578,675.03/2,115.38
  6. Step 6: Final answer
    x = 1,691.74

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1.5x scale

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.