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Finding the Fourth Proportional to 18,202.10, 25,119.79 and 10,245.20

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Solution

The fourth proportional to 18,202.10, 25,119.79 and 10,245.20 is: 14,138.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,202.10 : 25,119.79 = 10,245.20 : x
  2. Step 2: Convert to fraction form
    18,202.10/25,119.79 = 10,245.20/x
  3. Step 3: Cross multiply
    18,202.10x = 25,119.79 × 10,245.20
  4. Step 4: Simplify right side
    18,202.10x = 257,357,121.30
  5. Step 5: Solve for x
    x = 257,357,121.30/18,202.10
  6. Step 6: Final answer
    x = 14,138.87

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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.