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Finding the Third Proportional to 15,075 and 21,717

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Solution

The third proportional to 15,075 and 21,717 is: 31,285.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,075 : 21,717 = 21,717 : x
  2. Step 2: Convert to fraction form
    15,075/21,717 = 21,717/x
  3. Step 3: Cross multiply
    15,075x = 21,717 × 21,717
  4. Step 4: Simplify right side
    15,075x = 471,628,089
  5. Step 5: Solve for x
    x = 471,628,089/15,075
  6. Step 6: Final answer
    x = 31,285.45

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.