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Finding the Fourth Proportional to 18,672.66, 25,749.99 and 15,847.83

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Solution

The fourth proportional to 18,672.66, 25,749.99 and 15,847.83 is: 21,854.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.66 : 25,749.99 = 15,847.83 : x
  2. Step 2: Convert to fraction form
    18,672.66/25,749.99 = 15,847.83/x
  3. Step 3: Cross multiply
    18,672.66x = 25,749.99 × 15,847.83
  4. Step 4: Simplify right side
    18,672.66x = 408,081,464.02
  5. Step 5: Solve for x
    x = 408,081,464.02/18,672.66
  6. Step 6: Final answer
    x = 21,854.49

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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.