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Finding the Fourth Proportional to 28,661.46, 39,552.08 and 15,914.50

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Solution

The fourth proportional to 28,661.46, 39,552.08 and 15,914.50 is: 21,961.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,661.46 : 39,552.08 = 15,914.50 : x
  2. Step 2: Convert to fraction form
    28,661.46/39,552.08 = 15,914.50/x
  3. Step 3: Cross multiply
    28,661.46x = 39,552.08 × 15,914.50
  4. Step 4: Simplify right side
    28,661.46x = 629,451,577.16
  5. Step 5: Solve for x
    x = 629,451,577.16/28,661.46
  6. Step 6: Final answer
    x = 21,961.60

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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.