Home / 39,796.51-54,918.60-21,890.45

Finding the Fourth Proportional to 39,796.51, 54,918.60 and 21,890.45

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Solution

The fourth proportional to 39,796.51, 54,918.60 and 21,890.45 is: 30,208.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,796.51 : 54,918.60 = 21,890.45 : x
  2. Step 2: Convert to fraction form
    39,796.51/54,918.60 = 21,890.45/x
  3. Step 3: Cross multiply
    39,796.51x = 54,918.60 × 21,890.45
  4. Step 4: Simplify right side
    39,796.51x = 1,202,192,867.37
  5. Step 5: Solve for x
    x = 1,202,192,867.37/39,796.51
  6. Step 6: Final answer
    x = 30,208.50

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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.