Home / 2,121.18-3,164.74-1,887.29

Finding the Fourth Proportional to 2,121.18, 3,164.74 and 1,887.29

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Solution

The fourth proportional to 2,121.18, 3,164.74 and 1,887.29 is: 2,815.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.18 : 3,164.74 = 1,887.29 : x
  2. Step 2: Convert to fraction form
    2,121.18/3,164.74 = 1,887.29/x
  3. Step 3: Cross multiply
    2,121.18x = 3,164.74 × 1,887.29
  4. Step 4: Simplify right side
    2,121.18x = 5,972,782.15
  5. Step 5: Solve for x
    x = 5,972,782.15/2,121.18
  6. Step 6: Final answer
    x = 2,815.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.