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Finding the Fourth Proportional to 18,881.82, 28,314.97 and 8,208.86

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Solution

The fourth proportional to 18,881.82, 28,314.97 and 8,208.86 is: 12,309.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,881.82 : 28,314.97 = 8,208.86 : x
  2. Step 2: Convert to fraction form
    18,881.82/28,314.97 = 8,208.86/x
  3. Step 3: Cross multiply
    18,881.82x = 28,314.97 × 8,208.86
  4. Step 4: Simplify right side
    18,881.82x = 232,433,624.63
  5. Step 5: Solve for x
    x = 232,433,624.63/18,881.82
  6. Step 6: Final answer
    x = 12,309.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.