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Finding the Third Proportional to 12,991 and 19,000.50

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Solution

The third proportional to 12,991 and 19,000.50 is: 27,789.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991 : 19,000.50 = 19,000.50 : x
  2. Step 2: Convert to fraction form
    12,991/19,000.50 = 19,000.50/x
  3. Step 3: Cross multiply
    12,991x = 19,000.50 × 19,000.50
  4. Step 4: Simplify right side
    12,991x = 361,019,000.25
  5. Step 5: Solve for x
    x = 361,019,000.25/12,991
  6. Step 6: Final answer
    x = 27,789.93

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.