Home / 2,021.64-2,790.90-1,399.56

Finding the Fourth Proportional to 2,021.64, 2,790.90 and 1,399.56

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Solution

The fourth proportional to 2,021.64, 2,790.90 and 1,399.56 is: 1,932.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.64 : 2,790.90 = 1,399.56 : x
  2. Step 2: Convert to fraction form
    2,021.64/2,790.90 = 1,399.56/x
  3. Step 3: Cross multiply
    2,021.64x = 2,790.90 × 1,399.56
  4. Step 4: Simplify right side
    2,021.64x = 3,906,032.00
  5. Step 5: Solve for x
    x = 3,906,032.00/2,021.64
  6. Step 6: Final answer
    x = 1,932.11

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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.