Home / 20,445.50-30,668.21-6,406.60

Finding the Fourth Proportional to 20,445.50, 30,668.21 and 6,406.60

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Solution

The fourth proportional to 20,445.50, 30,668.21 and 6,406.60 is: 9,609.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,445.50 : 30,668.21 = 6,406.60 : x
  2. Step 2: Convert to fraction form
    20,445.50/30,668.21 = 6,406.60/x
  3. Step 3: Cross multiply
    20,445.50x = 30,668.21 × 6,406.60
  4. Step 4: Simplify right side
    20,445.50x = 196,478,845.48
  5. Step 5: Solve for x
    x = 196,478,845.48/20,445.50
  6. Step 6: Final answer
    x = 9,609.88

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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.