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Finding the Fourth Proportional to 18,309, 25,198.38 and 15,096.54

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Solution

The fourth proportional to 18,309, 25,198.38 and 15,096.54 is: 20,777.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,309 : 25,198.38 = 15,096.54 : x
  2. Step 2: Convert to fraction form
    18,309/25,198.38 = 15,096.54/x
  3. Step 3: Cross multiply
    18,309x = 25,198.38 × 15,096.54
  4. Step 4: Simplify right side
    18,309x = 380,408,351.61
  5. Step 5: Solve for x
    x = 380,408,351.61/18,309
  6. Step 6: Final answer
    x = 20,777.12

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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.