Home / 2,126.80-3,188.96-1,690.84

Finding the Fourth Proportional to 2,126.80, 3,188.96 and 1,690.84

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Solution

The fourth proportional to 2,126.80, 3,188.96 and 1,690.84 is: 2,535.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.80 : 3,188.96 = 1,690.84 : x
  2. Step 2: Convert to fraction form
    2,126.80/3,188.96 = 1,690.84/x
  3. Step 3: Cross multiply
    2,126.80x = 3,188.96 × 1,690.84
  4. Step 4: Simplify right side
    2,126.80x = 5,392,021.13
  5. Step 5: Solve for x
    x = 5,392,021.13/2,126.80
  6. Step 6: Final answer
    x = 2,535.27

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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.