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Finding the Fourth Proportional to 13,843, 20,751.72 and 5,521

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Solution

The fourth proportional to 13,843, 20,751.72 and 5,521 is: 8,276.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,843 : 20,751.72 = 5,521 : x
  2. Step 2: Convert to fraction form
    13,843/20,751.72 = 5,521/x
  3. Step 3: Cross multiply
    13,843x = 20,751.72 × 5,521
  4. Step 4: Simplify right side
    13,843x = 114,570,246.12
  5. Step 5: Solve for x
    x = 114,570,246.12/13,843
  6. Step 6: Final answer
    x = 8,276.40

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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.