Home / 2,012.91-2,778.87-1,563.78

Finding the Fourth Proportional to 2,012.91, 2,778.87 and 1,563.78

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Solution

The fourth proportional to 2,012.91, 2,778.87 and 1,563.78 is: 2,158.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,012.91 : 2,778.87 = 1,563.78 : x
  2. Step 2: Convert to fraction form
    2,012.91/2,778.87 = 1,563.78/x
  3. Step 3: Cross multiply
    2,012.91x = 2,778.87 × 1,563.78
  4. Step 4: Simplify right side
    2,012.91x = 4,345,544.91
  5. Step 5: Solve for x
    x = 4,345,544.91/2,012.91
  6. Step 6: Final answer
    x = 2,158.83

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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.