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Finding the Fourth Proportional to 18,202.45, 25,119.81 and 11,914.81

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Solution

The fourth proportional to 18,202.45, 25,119.81 and 11,914.81 is: 16,442.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,202.45 : 25,119.81 = 11,914.81 : x
  2. Step 2: Convert to fraction form
    18,202.45/25,119.81 = 11,914.81/x
  3. Step 3: Cross multiply
    18,202.45x = 25,119.81 × 11,914.81
  4. Step 4: Simplify right side
    18,202.45x = 299,297,763.39
  5. Step 5: Solve for x
    x = 299,297,763.39/18,202.45
  6. Step 6: Final answer
    x = 16,442.72

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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.