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Finding the Fourth Proportional to 8,211, 11,331.26 and 4,485.08

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Solution

The fourth proportional to 8,211, 11,331.26 and 4,485.08 is: 6,189.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,211 : 11,331.26 = 4,485.08 : x
  2. Step 2: Convert to fraction form
    8,211/11,331.26 = 4,485.08/x
  3. Step 3: Cross multiply
    8,211x = 11,331.26 × 4,485.08
  4. Step 4: Simplify right side
    8,211x = 50,821,607.60
  5. Step 5: Solve for x
    x = 50,821,607.60/8,211
  6. Step 6: Final answer
    x = 6,189.45

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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.