Home / 2,643.03-3,649.46-2,121.39

Finding the Fourth Proportional to 2,643.03, 3,649.46 and 2,121.39

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Solution

The fourth proportional to 2,643.03, 3,649.46 and 2,121.39 is: 2,929.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.03 : 3,649.46 = 2,121.39 : x
  2. Step 2: Convert to fraction form
    2,643.03/3,649.46 = 2,121.39/x
  3. Step 3: Cross multiply
    2,643.03x = 3,649.46 × 2,121.39
  4. Step 4: Simplify right side
    2,643.03x = 7,741,917.34
  5. Step 5: Solve for x
    x = 7,741,917.34/2,643.03
  6. Step 6: Final answer
    x = 2,929.18

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1.5x scale

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.