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Finding the Fourth Proportional to 18,694.64, 28,047.26 and 7,609.28

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Solution

The fourth proportional to 18,694.64, 28,047.26 and 7,609.28 is: 11,416.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,694.64 : 28,047.26 = 7,609.28 : x
  2. Step 2: Convert to fraction form
    18,694.64/28,047.26 = 7,609.28/x
  3. Step 3: Cross multiply
    18,694.64x = 28,047.26 × 7,609.28
  4. Step 4: Simplify right side
    18,694.64x = 213,419,276.29
  5. Step 5: Solve for x
    x = 213,419,276.29/18,694.64
  6. Step 6: Final answer
    x = 11,416.07

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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.