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Finding the Fourth Proportional to 18,866.97, 28,321.20 and 15,941.61

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Solution

The fourth proportional to 18,866.97, 28,321.20 and 15,941.61 is: 23,929.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.97 : 28,321.20 = 15,941.61 : x
  2. Step 2: Convert to fraction form
    18,866.97/28,321.20 = 15,941.61/x
  3. Step 3: Cross multiply
    18,866.97x = 28,321.20 × 15,941.61
  4. Step 4: Simplify right side
    18,866.97x = 451,485,525.13
  5. Step 5: Solve for x
    x = 451,485,525.13/18,866.97
  6. Step 6: Final answer
    x = 23,929.94

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1.5x scale

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.