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Finding the Fourth Proportional to 20,485.98, 30,728.67 and 6,634.98

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Solution

The fourth proportional to 20,485.98, 30,728.67 and 6,634.98 is: 9,952.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.98 : 30,728.67 = 6,634.98 : x
  2. Step 2: Convert to fraction form
    20,485.98/30,728.67 = 6,634.98/x
  3. Step 3: Cross multiply
    20,485.98x = 30,728.67 × 6,634.98
  4. Step 4: Simplify right side
    20,485.98x = 203,884,086.00
  5. Step 5: Solve for x
    x = 203,884,086.00/20,485.98
  6. Step 6: Final answer
    x = 9,952.37

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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.