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Finding the Fourth Proportional to 18,900.79, 28,323.48 and 16,824.96

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Solution

The fourth proportional to 18,900.79, 28,323.48 and 16,824.96 is: 25,212.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,900.79 : 28,323.48 = 16,824.96 : x
  2. Step 2: Convert to fraction form
    18,900.79/28,323.48 = 16,824.96/x
  3. Step 3: Cross multiply
    18,900.79x = 28,323.48 × 16,824.96
  4. Step 4: Simplify right side
    18,900.79x = 476,541,481.15
  5. Step 5: Solve for x
    x = 476,541,481.15/18,900.79
  6. Step 6: Final answer
    x = 25,212.78

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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.