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Finding the Fourth Proportional to 38,447.44, 53,059.56 and 21,455.44

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Solution

The fourth proportional to 38,447.44, 53,059.56 and 21,455.44 is: 29,609.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,447.44 : 53,059.56 = 21,455.44 : x
  2. Step 2: Convert to fraction form
    38,447.44/53,059.56 = 21,455.44/x
  3. Step 3: Cross multiply
    38,447.44x = 53,059.56 × 21,455.44
  4. Step 4: Simplify right side
    38,447.44x = 1,138,416,206.01
  5. Step 5: Solve for x
    x = 1,138,416,206.01/38,447.44
  6. Step 6: Final answer
    x = 29,609.68

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Half scale
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Double scale
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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.