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Finding the Fourth Proportional to 20,771.60, 31,092.60 and 14,939.60

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Solution

The fourth proportional to 20,771.60, 31,092.60 and 14,939.60 is: 22,362.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.60 : 31,092.60 = 14,939.60 : x
  2. Step 2: Convert to fraction form
    20,771.60/31,092.60 = 14,939.60/x
  3. Step 3: Cross multiply
    20,771.60x = 31,092.60 × 14,939.60
  4. Step 4: Simplify right side
    20,771.60x = 464,511,006.96
  5. Step 5: Solve for x
    x = 464,511,006.96/20,771.60
  6. Step 6: Final answer
    x = 22,362.79

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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.