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Finding the Fourth Proportional to 28,860.86, 43,295.74 and 12,221

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Solution

The fourth proportional to 28,860.86, 43,295.74 and 12,221 is: 18,333.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,860.86 : 43,295.74 = 12,221 : x
  2. Step 2: Convert to fraction form
    28,860.86/43,295.74 = 12,221/x
  3. Step 3: Cross multiply
    28,860.86x = 43,295.74 × 12,221
  4. Step 4: Simplify right side
    28,860.86x = 529,117,238.54
  5. Step 5: Solve for x
    x = 529,117,238.54/28,860.86
  6. Step 6: Final answer
    x = 18,333.38

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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.