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Finding the Fourth Proportional to 20,906.92, 28,851.53 and 11,832.11

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Solution

The fourth proportional to 20,906.92, 28,851.53 and 11,832.11 is: 16,328.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.92 : 28,851.53 = 11,832.11 : x
  2. Step 2: Convert to fraction form
    20,906.92/28,851.53 = 11,832.11/x
  3. Step 3: Cross multiply
    20,906.92x = 28,851.53 × 11,832.11
  4. Step 4: Simplify right side
    20,906.92x = 341,374,632.43
  5. Step 5: Solve for x
    x = 341,374,632.43/20,906.92
  6. Step 6: Final answer
    x = 16,328.31

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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.