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Finding the Fourth Proportional to 18,431.14, 25,418.10 and 13,662.96

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Solution

The fourth proportional to 18,431.14, 25,418.10 and 13,662.96 is: 18,842.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,431.14 : 25,418.10 = 13,662.96 : x
  2. Step 2: Convert to fraction form
    18,431.14/25,418.10 = 13,662.96/x
  3. Step 3: Cross multiply
    18,431.14x = 25,418.10 × 13,662.96
  4. Step 4: Simplify right side
    18,431.14x = 347,286,483.58
  5. Step 5: Solve for x
    x = 347,286,483.58/18,431.14
  6. Step 6: Final answer
    x = 18,842.38

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1.5x scale

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.