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Finding the Fourth Proportional to 20,548.70, 30,816.79 and 10,682.60

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Solution

The fourth proportional to 20,548.70, 30,816.79 and 10,682.60 is: 16,020.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,548.70 : 30,816.79 = 10,682.60 : x
  2. Step 2: Convert to fraction form
    20,548.70/30,816.79 = 10,682.60/x
  3. Step 3: Cross multiply
    20,548.70x = 30,816.79 × 10,682.60
  4. Step 4: Simplify right side
    20,548.70x = 329,203,440.85
  5. Step 5: Solve for x
    x = 329,203,440.85/20,548.70
  6. Step 6: Final answer
    x = 16,020.65

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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.