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Finding the Fourth Proportional to 20,468.80, 30,703.20 and 11,704.60

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Solution

The fourth proportional to 20,468.80, 30,703.20 and 11,704.60 is: 17,556.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,468.80 : 30,703.20 = 11,704.60 : x
  2. Step 2: Convert to fraction form
    20,468.80/30,703.20 = 11,704.60/x
  3. Step 3: Cross multiply
    20,468.80x = 30,703.20 × 11,704.60
  4. Step 4: Simplify right side
    20,468.80x = 359,368,674.72
  5. Step 5: Solve for x
    x = 359,368,674.72/20,468.80
  6. Step 6: Final answer
    x = 17,556.90

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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.