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Finding the Fourth Proportional to 13,661.96, 20,490.90 and 3,800.22

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Solution

The fourth proportional to 13,661.96, 20,490.90 and 3,800.22 is: 5,699.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.96 : 20,490.90 = 3,800.22 : x
  2. Step 2: Convert to fraction form
    13,661.96/20,490.90 = 3,800.22/x
  3. Step 3: Cross multiply
    13,661.96x = 20,490.90 × 3,800.22
  4. Step 4: Simplify right side
    13,661.96x = 77,869,928.00
  5. Step 5: Solve for x
    x = 77,869,928.00/13,661.96
  6. Step 6: Final answer
    x = 5,699.76

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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.