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Finding the Fourth Proportional to 36,808, 50,800.80 and 21,912.64

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Solution

The fourth proportional to 36,808, 50,800.80 and 21,912.64 is: 30,242.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,808 : 50,800.80 = 21,912.64 : x
  2. Step 2: Convert to fraction form
    36,808/50,800.80 = 21,912.64/x
  3. Step 3: Cross multiply
    36,808x = 50,800.80 × 21,912.64
  4. Step 4: Simplify right side
    36,808x = 1,113,179,642.11
  5. Step 5: Solve for x
    x = 1,113,179,642.11/36,808
  6. Step 6: Final answer
    x = 30,242.87

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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.