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Finding the Fourth Proportional to 18,122.40, 27,183.60 and 13,748.40

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Solution

The fourth proportional to 18,122.40, 27,183.60 and 13,748.40 is: 20,622.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,122.40 : 27,183.60 = 13,748.40 : x
  2. Step 2: Convert to fraction form
    18,122.40/27,183.60 = 13,748.40/x
  3. Step 3: Cross multiply
    18,122.40x = 27,183.60 × 13,748.40
  4. Step 4: Simplify right side
    18,122.40x = 373,731,006.24
  5. Step 5: Solve for x
    x = 373,731,006.24/18,122.40
  6. Step 6: Final answer
    x = 20,622.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.