Home / 39,183.20-54,072.64-21,278.06

Finding the Fourth Proportional to 39,183.20, 54,072.64 and 21,278.06

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Solution

The fourth proportional to 39,183.20, 54,072.64 and 21,278.06 is: 29,363.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,183.20 : 54,072.64 = 21,278.06 : x
  2. Step 2: Convert to fraction form
    39,183.20/54,072.64 = 21,278.06/x
  3. Step 3: Cross multiply
    39,183.20x = 54,072.64 × 21,278.06
  4. Step 4: Simplify right side
    39,183.20x = 1,150,560,878.28
  5. Step 5: Solve for x
    x = 1,150,560,878.28/39,183.20
  6. Step 6: Final answer
    x = 29,363.63

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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.