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Finding the Fourth Proportional to 20,445.62, 30,668.40 and 6,406.73

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Solution

The fourth proportional to 20,445.62, 30,668.40 and 6,406.73 is: 9,610.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,445.62 : 30,668.40 = 6,406.73 : x
  2. Step 2: Convert to fraction form
    20,445.62/30,668.40 = 6,406.73/x
  3. Step 3: Cross multiply
    20,445.62x = 30,668.40 × 6,406.73
  4. Step 4: Simplify right side
    20,445.62x = 196,483,972.96
  5. Step 5: Solve for x
    x = 196,483,972.96/20,445.62
  6. Step 6: Final answer
    x = 9,610.08

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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.