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Finding the Fourth Proportional to 20,626.40, 30,945.78 and 8,148.20

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Solution

The fourth proportional to 20,626.40, 30,945.78 and 8,148.20 is: 12,224.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,626.40 : 30,945.78 = 8,148.20 : x
  2. Step 2: Convert to fraction form
    20,626.40/30,945.78 = 8,148.20/x
  3. Step 3: Cross multiply
    20,626.40x = 30,945.78 × 8,148.20
  4. Step 4: Simplify right side
    20,626.40x = 252,152,404.60
  5. Step 5: Solve for x
    x = 252,152,404.60/20,626.40
  6. Step 6: Final answer
    x = 12,224.74

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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.