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Finding the Third Proportional to 21,919.50 and 36,009

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Solution

The third proportional to 21,919.50 and 36,009 is: 59,155.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,919.50 : 36,009 = 36,009 : x
  2. Step 2: Convert to fraction form
    21,919.50/36,009 = 36,009/x
  3. Step 3: Cross multiply
    21,919.50x = 36,009 × 36,009
  4. Step 4: Simplify right side
    21,919.50x = 1,296,648,081
  5. Step 5: Solve for x
    x = 1,296,648,081/21,919.50
  6. Step 6: Final answer
    x = 59,155.00

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Why These Related Problems?

These problems maintain the same ratio (1.64) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.