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Finding the Fourth Proportional to 38,684.88, 53,383.32 and 21,914.64

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Solution

The fourth proportional to 38,684.88, 53,383.32 and 21,914.64 is: 30,241.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,684.88 : 53,383.32 = 21,914.64 : x
  2. Step 2: Convert to fraction form
    38,684.88/53,383.32 = 21,914.64/x
  3. Step 3: Cross multiply
    38,684.88x = 53,383.32 × 21,914.64
  4. Step 4: Simplify right side
    38,684.88x = 1,169,876,239.80
  5. Step 5: Solve for x
    x = 1,169,876,239.80/38,684.88
  6. Step 6: Final answer
    x = 30,241.18

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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.