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Finding the Fourth Proportional to 13,183.88, 19,779.05 and 3,949.88

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Solution

The fourth proportional to 13,183.88, 19,779.05 and 3,949.88 is: 5,925.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,183.88 : 19,779.05 = 3,949.88 : x
  2. Step 2: Convert to fraction form
    13,183.88/19,779.05 = 3,949.88/x
  3. Step 3: Cross multiply
    13,183.88x = 19,779.05 × 3,949.88
  4. Step 4: Simplify right side
    13,183.88x = 78,124,784.99
  5. Step 5: Solve for x
    x = 78,124,784.99/13,183.88
  6. Step 6: Final answer
    x = 5,925.78

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1.5x scale

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.