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Finding the Fourth Proportional to 19,906.02, 29,865.78 and 8,811.18

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Solution

The fourth proportional to 19,906.02, 29,865.78 and 8,811.18 is: 13,219.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,906.02 : 29,865.78 = 8,811.18 : x
  2. Step 2: Convert to fraction form
    19,906.02/29,865.78 = 8,811.18/x
  3. Step 3: Cross multiply
    19,906.02x = 29,865.78 × 8,811.18
  4. Step 4: Simplify right side
    19,906.02x = 263,152,763.42
  5. Step 5: Solve for x
    x = 263,152,763.42/19,906.02
  6. Step 6: Final answer
    x = 13,219.76

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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.