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Finding the Fourth Proportional to 19,908.63, 29,863.35 and 8,813.25

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Solution

The fourth proportional to 19,908.63, 29,863.35 and 8,813.25 is: 13,220.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,908.63 : 29,863.35 = 8,813.25 : x
  2. Step 2: Convert to fraction form
    19,908.63/29,863.35 = 8,813.25/x
  3. Step 3: Cross multiply
    19,908.63x = 29,863.35 × 8,813.25
  4. Step 4: Simplify right side
    19,908.63x = 263,193,169.39
  5. Step 5: Solve for x
    x = 263,193,169.39/19,908.63
  6. Step 6: Final answer
    x = 13,220.05

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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.