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Finding the Fourth Proportional to 47,447.70, 71,193.69 and 21,149.70

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Solution

The fourth proportional to 47,447.70, 71,193.69 and 21,149.70 is: 31,734.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,447.70 : 71,193.69 = 21,149.70 : x
  2. Step 2: Convert to fraction form
    47,447.70/71,193.69 = 21,149.70/x
  3. Step 3: Cross multiply
    47,447.70x = 71,193.69 × 21,149.70
  4. Step 4: Simplify right side
    47,447.70x = 1,505,725,185.39
  5. Step 5: Solve for x
    x = 1,505,725,185.39/47,447.70
  6. Step 6: Final answer
    x = 31,734.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.