Home / 20,906.21-28,850.64-11,346.09

Finding the Fourth Proportional to 20,906.21, 28,850.64 and 11,346.09

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Solution

The fourth proportional to 20,906.21, 28,850.64 and 11,346.09 is: 15,657.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.21 : 28,850.64 = 11,346.09 : x
  2. Step 2: Convert to fraction form
    20,906.21/28,850.64 = 11,346.09/x
  3. Step 3: Cross multiply
    20,906.21x = 28,850.64 × 11,346.09
  4. Step 4: Simplify right side
    20,906.21x = 327,341,958.00
  5. Step 5: Solve for x
    x = 327,341,958.00/20,906.21
  6. Step 6: Final answer
    x = 15,657.64

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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.