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Finding the Fourth Proportional to 14,503.80, 21,723.30 and 11,911.80

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Solution

The fourth proportional to 14,503.80, 21,723.30 and 11,911.80 is: 17,841.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,503.80 : 21,723.30 = 11,911.80 : x
  2. Step 2: Convert to fraction form
    14,503.80/21,723.30 = 11,911.80/x
  3. Step 3: Cross multiply
    14,503.80x = 21,723.30 × 11,911.80
  4. Step 4: Simplify right side
    14,503.80x = 258,763,604.94
  5. Step 5: Solve for x
    x = 258,763,604.94/14,503.80
  6. Step 6: Final answer
    x = 17,841.09

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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.