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Finding the Fourth Proportional to 12,999.89, 17,940.11 and 7,626.20

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Solution

The fourth proportional to 12,999.89, 17,940.11 and 7,626.20 is: 10,524.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999.89 : 17,940.11 = 7,626.20 : x
  2. Step 2: Convert to fraction form
    12,999.89/17,940.11 = 7,626.20/x
  3. Step 3: Cross multiply
    12,999.89x = 17,940.11 × 7,626.20
  4. Step 4: Simplify right side
    12,999.89x = 136,814,739.05
  5. Step 5: Solve for x
    x = 136,814,739.05/12,999.89
  6. Step 6: Final answer
    x = 10,524.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.