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Finding the Fourth Proportional to 28,554, 39,404.52 and 15,978.84

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Solution

The fourth proportional to 28,554, 39,404.52 and 15,978.84 is: 22,050.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,554 : 39,404.52 = 15,978.84 : x
  2. Step 2: Convert to fraction form
    28,554/39,404.52 = 15,978.84/x
  3. Step 3: Cross multiply
    28,554x = 39,404.52 × 15,978.84
  4. Step 4: Simplify right side
    28,554x = 629,638,520.36
  5. Step 5: Solve for x
    x = 629,638,520.36/28,554
  6. Step 6: Final answer
    x = 22,050.80

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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.