Home / 2,021.10-2,790.10-1,358.44

Finding the Fourth Proportional to 2,021.10, 2,790.10 and 1,358.44

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Solution

The fourth proportional to 2,021.10, 2,790.10 and 1,358.44 is: 1,875.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.10 : 2,790.10 = 1,358.44 : x
  2. Step 2: Convert to fraction form
    2,021.10/2,790.10 = 1,358.44/x
  3. Step 3: Cross multiply
    2,021.10x = 2,790.10 × 1,358.44
  4. Step 4: Simplify right side
    2,021.10x = 3,790,183.44
  5. Step 5: Solve for x
    x = 3,790,183.44/2,021.10
  6. Step 6: Final answer
    x = 1,875.31

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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.