Home / 22,021.05-33,128.78-20,640.81

Finding the Fourth Proportional to 22,021.05, 33,128.78 and 20,640.81

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Solution

The fourth proportional to 22,021.05, 33,128.78 and 20,640.81 is: 31,052.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,021.05 : 33,128.78 = 20,640.81 : x
  2. Step 2: Convert to fraction form
    22,021.05/33,128.78 = 20,640.81/x
  3. Step 3: Cross multiply
    22,021.05x = 33,128.78 × 20,640.81
  4. Step 4: Simplify right side
    22,021.05x = 683,804,750.31
  5. Step 5: Solve for x
    x = 683,804,750.31/22,021.05
  6. Step 6: Final answer
    x = 31,052.32

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1.5x scale

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.