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Finding the Fourth Proportional to 38,656.56, 53,344.56 and 21,889.60

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Solution

The fourth proportional to 38,656.56, 53,344.56 and 21,889.60 is: 30,206.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,656.56 : 53,344.56 = 21,889.60 : x
  2. Step 2: Convert to fraction form
    38,656.56/53,344.56 = 21,889.60/x
  3. Step 3: Cross multiply
    38,656.56x = 53,344.56 × 21,889.60
  4. Step 4: Simplify right side
    38,656.56x = 1,167,691,080.58
  5. Step 5: Solve for x
    x = 1,167,691,080.58/38,656.56
  6. Step 6: Final answer
    x = 30,206.80

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Similar ratio
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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.