Home / 3,012.78-4,156.41-2,128.26

Finding the Fourth Proportional to 3,012.78, 4,156.41 and 2,128.26

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Solution

The fourth proportional to 3,012.78, 4,156.41 and 2,128.26 is: 2,936.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,012.78 : 4,156.41 = 2,128.26 : x
  2. Step 2: Convert to fraction form
    3,012.78/4,156.41 = 2,128.26/x
  3. Step 3: Cross multiply
    3,012.78x = 4,156.41 × 2,128.26
  4. Step 4: Simplify right side
    3,012.78x = 8,845,921.15
  5. Step 5: Solve for x
    x = 8,845,921.15/3,012.78
  6. Step 6: Final answer
    x = 2,936.13

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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.