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Finding the Fourth Proportional to 21,808.86, 30,093.99 and 12,249.81

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Solution

The fourth proportional to 21,808.86, 30,093.99 and 12,249.81 is: 16,903.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,808.86 : 30,093.99 = 12,249.81 : x
  2. Step 2: Convert to fraction form
    21,808.86/30,093.99 = 12,249.81/x
  3. Step 3: Cross multiply
    21,808.86x = 30,093.99 × 12,249.81
  4. Step 4: Simplify right side
    21,808.86x = 368,645,659.64
  5. Step 5: Solve for x
    x = 368,645,659.64/21,808.86
  6. Step 6: Final answer
    x = 16,903.48

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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.