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Finding the Fourth Proportional to 13,751.96, 20,631.30 and 4,391.98

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Solution

The fourth proportional to 13,751.96, 20,631.30 and 4,391.98 is: 6,589.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,751.96 : 20,631.30 = 4,391.98 : x
  2. Step 2: Convert to fraction form
    13,751.96/20,631.30 = 4,391.98/x
  3. Step 3: Cross multiply
    13,751.96x = 20,631.30 × 4,391.98
  4. Step 4: Simplify right side
    13,751.96x = 90,612,256.97
  5. Step 5: Solve for x
    x = 90,612,256.97/13,751.96
  6. Step 6: Final answer
    x = 6,589.04

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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.