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Finding the Fourth Proportional to 36,380.80, 54,573.50 and 11,421.80

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Solution

The fourth proportional to 36,380.80, 54,573.50 and 11,421.80 is: 17,133.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,380.80 : 54,573.50 = 11,421.80 : x
  2. Step 2: Convert to fraction form
    36,380.80/54,573.50 = 11,421.80/x
  3. Step 3: Cross multiply
    36,380.80x = 54,573.50 × 11,421.80
  4. Step 4: Simplify right side
    36,380.80x = 623,327,602.30
  5. Step 5: Solve for x
    x = 623,327,602.30/36,380.80
  6. Step 6: Final answer
    x = 17,133.42

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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.