Home / 2,021.80-3,032.70-1,328.80

Finding the Fourth Proportional to 2,021.80, 3,032.70 and 1,328.80

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Solution

The fourth proportional to 2,021.80, 3,032.70 and 1,328.80 is: 1,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.80 : 3,032.70 = 1,328.80 : x
  2. Step 2: Convert to fraction form
    2,021.80/3,032.70 = 1,328.80/x
  3. Step 3: Cross multiply
    2,021.80x = 3,032.70 × 1,328.80
  4. Step 4: Simplify right side
    2,021.80x = 4,029,851.76
  5. Step 5: Solve for x
    x = 4,029,851.76/2,021.80
  6. Step 6: Final answer
    x = 1,993.20

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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.