Home / 2,129.80-3,189.30-2,032.60

Finding the Fourth Proportional to 2,129.80, 3,189.30 and 2,032.60

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Solution

The fourth proportional to 2,129.80, 3,189.30 and 2,032.60 is: 3,043.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.80 : 3,189.30 = 2,032.60 : x
  2. Step 2: Convert to fraction form
    2,129.80/3,189.30 = 2,032.60/x
  3. Step 3: Cross multiply
    2,129.80x = 3,189.30 × 2,032.60
  4. Step 4: Simplify right side
    2,129.80x = 6,482,571.18
  5. Step 5: Solve for x
    x = 6,482,571.18/2,129.80
  6. Step 6: Final answer
    x = 3,043.75

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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.