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Finding the Fourth Proportional to 48,680.64, 73,021.10 and 13,620.60

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Solution

The fourth proportional to 48,680.64, 73,021.10 and 13,620.60 is: 20,430.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,680.64 : 73,021.10 = 13,620.60 : x
  2. Step 2: Convert to fraction form
    48,680.64/73,021.10 = 13,620.60/x
  3. Step 3: Cross multiply
    48,680.64x = 73,021.10 × 13,620.60
  4. Step 4: Simplify right side
    48,680.64x = 994,591,126.56
  5. Step 5: Solve for x
    x = 994,591,126.56/48,680.64
  6. Step 6: Final answer
    x = 20,430.94

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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.