Home / 13,691.44-18,906.78-12,954.88

Finding the Fourth Proportional to 13,691.44, 18,906.78 and 12,954.88

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Solution

The fourth proportional to 13,691.44, 18,906.78 and 12,954.88 is: 17,889.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.44 : 18,906.78 = 12,954.88 : x
  2. Step 2: Convert to fraction form
    13,691.44/18,906.78 = 12,954.88/x
  3. Step 3: Cross multiply
    13,691.44x = 18,906.78 × 12,954.88
  4. Step 4: Simplify right side
    13,691.44x = 244,935,066.09
  5. Step 5: Solve for x
    x = 244,935,066.09/13,691.44
  6. Step 6: Final answer
    x = 17,889.65

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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.