Home / 39,874.89-55,028.06-21,969.78

Finding the Fourth Proportional to 39,874.89, 55,028.06 and 21,969.78

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Solution

The fourth proportional to 39,874.89, 55,028.06 and 21,969.78 is: 30,318.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,874.89 : 55,028.06 = 21,969.78 : x
  2. Step 2: Convert to fraction form
    39,874.89/55,028.06 = 21,969.78/x
  3. Step 3: Cross multiply
    39,874.89x = 55,028.06 × 21,969.78
  4. Step 4: Simplify right side
    39,874.89x = 1,208,954,372.03
  5. Step 5: Solve for x
    x = 1,208,954,372.03/39,874.89
  6. Step 6: Final answer
    x = 30,318.69

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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.