Home / 2,661.50-3,673.70-1,821.90

Finding the Fourth Proportional to 2,661.50, 3,673.70 and 1,821.90

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Solution

The fourth proportional to 2,661.50, 3,673.70 and 1,821.90 is: 2,514.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661.50 : 3,673.70 = 1,821.90 : x
  2. Step 2: Convert to fraction form
    2,661.50/3,673.70 = 1,821.90/x
  3. Step 3: Cross multiply
    2,661.50x = 3,673.70 × 1,821.90
  4. Step 4: Simplify right side
    2,661.50x = 6,693,114.03
  5. Step 5: Solve for x
    x = 6,693,114.03/2,661.50
  6. Step 6: Final answer
    x = 2,514.79

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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.