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Finding the Fourth Proportional to 13,305.92, 18,369.81 and 8,835.80

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Solution

The fourth proportional to 13,305.92, 18,369.81 and 8,835.80 is: 12,198.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,305.92 : 18,369.81 = 8,835.80 : x
  2. Step 2: Convert to fraction form
    13,305.92/18,369.81 = 8,835.80/x
  3. Step 3: Cross multiply
    13,305.92x = 18,369.81 × 8,835.80
  4. Step 4: Simplify right side
    13,305.92x = 162,311,875.35
  5. Step 5: Solve for x
    x = 162,311,875.35/13,305.92
  6. Step 6: Final answer
    x = 12,198.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.