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Finding the Fourth Proportional to 28,978.46, 39,991.26 and 16,232.19

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Solution

The fourth proportional to 28,978.46, 39,991.26 and 16,232.19 is: 22,400.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978.46 : 39,991.26 = 16,232.19 : x
  2. Step 2: Convert to fraction form
    28,978.46/39,991.26 = 16,232.19/x
  3. Step 3: Cross multiply
    28,978.46x = 39,991.26 × 16,232.19
  4. Step 4: Simplify right side
    28,978.46x = 649,145,641.56
  5. Step 5: Solve for x
    x = 649,145,641.56/28,978.46
  6. Step 6: Final answer
    x = 22,400.97

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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.