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Finding the Fourth Proportional to 13,697.45, 18,902.03 and 7,955.54

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Solution

The fourth proportional to 13,697.45, 18,902.03 and 7,955.54 is: 10,978.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,697.45 : 18,902.03 = 7,955.54 : x
  2. Step 2: Convert to fraction form
    13,697.45/18,902.03 = 7,955.54/x
  3. Step 3: Cross multiply
    13,697.45x = 18,902.03 × 7,955.54
  4. Step 4: Simplify right side
    13,697.45x = 150,375,815.97
  5. Step 5: Solve for x
    x = 150,375,815.97/13,697.45
  6. Step 6: Final answer
    x = 10,978.38

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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.