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Finding the Fourth Proportional to 21,773.88, 30,048.48 and 13,276.44

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Solution

The fourth proportional to 21,773.88, 30,048.48 and 13,276.44 is: 18,321.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,773.88 : 30,048.48 = 13,276.44 : x
  2. Step 2: Convert to fraction form
    21,773.88/30,048.48 = 13,276.44/x
  3. Step 3: Cross multiply
    21,773.88x = 30,048.48 × 13,276.44
  4. Step 4: Simplify right side
    21,773.88x = 398,936,841.81
  5. Step 5: Solve for x
    x = 398,936,841.81/21,773.88
  6. Step 6: Final answer
    x = 18,321.81

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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.