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Finding the Fourth Proportional to 28,672.81, 42,992.82 and 11,122.15

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Solution

The fourth proportional to 28,672.81, 42,992.82 and 11,122.15 is: 16,676.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,672.81 : 42,992.82 = 11,122.15 : x
  2. Step 2: Convert to fraction form
    28,672.81/42,992.82 = 11,122.15/x
  3. Step 3: Cross multiply
    28,672.81x = 42,992.82 × 11,122.15
  4. Step 4: Simplify right side
    28,672.81x = 478,172,592.96
  5. Step 5: Solve for x
    x = 478,172,592.96/28,672.81
  6. Step 6: Final answer
    x = 16,676.87

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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.