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Finding the Fourth Proportional to 33,185.70, 45,783.90 and 21,861.90

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Solution

The fourth proportional to 33,185.70, 45,783.90 and 21,861.90 is: 30,161.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,185.70 : 45,783.90 = 21,861.90 : x
  2. Step 2: Convert to fraction form
    33,185.70/45,783.90 = 21,861.90/x
  3. Step 3: Cross multiply
    33,185.70x = 45,783.90 × 21,861.90
  4. Step 4: Simplify right side
    33,185.70x = 1,000,923,043.41
  5. Step 5: Solve for x
    x = 1,000,923,043.41/33,185.70
  6. Step 6: Final answer
    x = 30,161.28

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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.