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Finding the Fourth Proportional to 12,608.16, 18,910.80 and 4,816.80

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Solution

The fourth proportional to 12,608.16, 18,910.80 and 4,816.80 is: 7,224.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,608.16 : 18,910.80 = 4,816.80 : x
  2. Step 2: Convert to fraction form
    12,608.16/18,910.80 = 4,816.80/x
  3. Step 3: Cross multiply
    12,608.16x = 18,910.80 × 4,816.80
  4. Step 4: Simplify right side
    12,608.16x = 91,089,541.44
  5. Step 5: Solve for x
    x = 91,089,541.44/12,608.16
  6. Step 6: Final answer
    x = 7,224.65

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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.