Home / 39,777.78-54,893.50-21,872.36

Finding the Fourth Proportional to 39,777.78, 54,893.50 and 21,872.36

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Solution

The fourth proportional to 39,777.78, 54,893.50 and 21,872.36 is: 30,183.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,777.78 : 54,893.50 = 21,872.36 : x
  2. Step 2: Convert to fraction form
    39,777.78/54,893.50 = 21,872.36/x
  3. Step 3: Cross multiply
    39,777.78x = 54,893.50 × 21,872.36
  4. Step 4: Simplify right side
    39,777.78x = 1,200,650,393.66
  5. Step 5: Solve for x
    x = 1,200,650,393.66/39,777.78
  6. Step 6: Final answer
    x = 30,183.95

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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.