Home / 2,121.80-3,185.46-1,635.20

Finding the Fourth Proportional to 2,121.80, 3,185.46 and 1,635.20

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Solution

The fourth proportional to 2,121.80, 3,185.46 and 1,635.20 is: 2,454.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.80 : 3,185.46 = 1,635.20 : x
  2. Step 2: Convert to fraction form
    2,121.80/3,185.46 = 1,635.20/x
  3. Step 3: Cross multiply
    2,121.80x = 3,185.46 × 1,635.20
  4. Step 4: Simplify right side
    2,121.80x = 5,208,864.19
  5. Step 5: Solve for x
    x = 5,208,864.19/2,121.80
  6. Step 6: Final answer
    x = 2,454.93

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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.