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Finding the Fourth Proportional to 20,571.75, 30,861.86 and 6,531.48

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Solution

The fourth proportional to 20,571.75, 30,861.86 and 6,531.48 is: 9,798.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.75 : 30,861.86 = 6,531.48 : x
  2. Step 2: Convert to fraction form
    20,571.75/30,861.86 = 6,531.48/x
  3. Step 3: Cross multiply
    20,571.75x = 30,861.86 × 6,531.48
  4. Step 4: Simplify right side
    20,571.75x = 201,573,588.70
  5. Step 5: Solve for x
    x = 201,573,588.70/20,571.75
  6. Step 6: Final answer
    x = 9,798.56

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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.