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Finding the Fourth Proportional to 18,694.51, 27,956.50 and 13,954.03

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Solution

The fourth proportional to 18,694.51, 27,956.50 and 13,954.03 is: 20,867.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,694.51 : 27,956.50 = 13,954.03 : x
  2. Step 2: Convert to fraction form
    18,694.51/27,956.50 = 13,954.03/x
  3. Step 3: Cross multiply
    18,694.51x = 27,956.50 × 13,954.03
  4. Step 4: Simplify right side
    18,694.51x = 390,105,839.70
  5. Step 5: Solve for x
    x = 390,105,839.70/18,694.51
  6. Step 6: Final answer
    x = 20,867.40

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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.