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Finding the Fourth Proportional to 12,626.60, 18,923.22 and 5,220.86

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Solution

The fourth proportional to 12,626.60, 18,923.22 and 5,220.86 is: 7,824.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,626.60 : 18,923.22 = 5,220.86 : x
  2. Step 2: Convert to fraction form
    12,626.60/18,923.22 = 5,220.86/x
  3. Step 3: Cross multiply
    12,626.60x = 18,923.22 × 5,220.86
  4. Step 4: Simplify right side
    12,626.60x = 98,795,387.75
  5. Step 5: Solve for x
    x = 98,795,387.75/12,626.60
  6. Step 6: Final answer
    x = 7,824.39

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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.