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Finding the Fourth Proportional to 19,638.92, 29,406.09 and 13,411.09

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Solution

The fourth proportional to 19,638.92, 29,406.09 and 13,411.09 is: 20,080.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,638.92 : 29,406.09 = 13,411.09 : x
  2. Step 2: Convert to fraction form
    19,638.92/29,406.09 = 13,411.09/x
  3. Step 3: Cross multiply
    19,638.92x = 29,406.09 × 13,411.09
  4. Step 4: Simplify right side
    19,638.92x = 394,367,898.72
  5. Step 5: Solve for x
    x = 394,367,898.72/19,638.92
  6. Step 6: Final answer
    x = 20,080.94

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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.