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Finding the Fourth Proportional to 21,698.92, 29,936.46 and 12,260.44

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Solution

The fourth proportional to 21,698.92, 29,936.46 and 12,260.44 is: 16,914.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,698.92 : 29,936.46 = 12,260.44 : x
  2. Step 2: Convert to fraction form
    21,698.92/29,936.46 = 12,260.44/x
  3. Step 3: Cross multiply
    21,698.92x = 29,936.46 × 12,260.44
  4. Step 4: Simplify right side
    21,698.92x = 367,034,171.64
  5. Step 5: Solve for x
    x = 367,034,171.64/21,698.92
  6. Step 6: Final answer
    x = 16,914.86

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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.