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Finding the Fourth Proportional to 13,187.92, 19,781.84 and 3,327.98

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Solution

The fourth proportional to 13,187.92, 19,781.84 and 3,327.98 is: 4,991.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.92 : 19,781.84 = 3,327.98 : x
  2. Step 2: Convert to fraction form
    13,187.92/19,781.84 = 3,327.98/x
  3. Step 3: Cross multiply
    13,187.92x = 19,781.84 × 3,327.98
  4. Step 4: Simplify right side
    13,187.92x = 65,833,567.88
  5. Step 5: Solve for x
    x = 65,833,567.88/13,187.92
  6. Step 6: Final answer
    x = 4,991.96

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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.