Home / 2,128.12-2,938.26-1,629.88

Finding the Fourth Proportional to 2,128.12, 2,938.26 and 1,629.88

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Solution

The fourth proportional to 2,128.12, 2,938.26 and 1,629.88 is: 2,250.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.12 : 2,938.26 = 1,629.88 : x
  2. Step 2: Convert to fraction form
    2,128.12/2,938.26 = 1,629.88/x
  3. Step 3: Cross multiply
    2,128.12x = 2,938.26 × 1,629.88
  4. Step 4: Simplify right side
    2,128.12x = 4,789,011.21
  5. Step 5: Solve for x
    x = 4,789,011.21/2,128.12
  6. Step 6: Final answer
    x = 2,250.35

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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.