Home / 39,817.97-54,948.80-21,912.98

Finding the Fourth Proportional to 39,817.97, 54,948.80 and 21,912.98

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Solution

The fourth proportional to 39,817.97, 54,948.80 and 21,912.98 is: 30,239.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,817.97 : 54,948.80 = 21,912.98 : x
  2. Step 2: Convert to fraction form
    39,817.97/54,948.80 = 21,912.98/x
  3. Step 3: Cross multiply
    39,817.97x = 54,948.80 × 21,912.98
  4. Step 4: Simplify right side
    39,817.97x = 1,204,091,571.12
  5. Step 5: Solve for x
    x = 1,204,091,571.12/39,817.97
  6. Step 6: Final answer
    x = 30,239.91

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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.