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Finding the Third Proportional to 15,090 and 20,275

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Solution

The third proportional to 15,090 and 20,275 is: 27,241.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090 : 20,275 = 20,275 : x
  2. Step 2: Convert to fraction form
    15,090/20,275 = 20,275/x
  3. Step 3: Cross multiply
    15,090x = 20,275 × 20,275
  4. Step 4: Simplify right side
    15,090x = 411,075,625
  5. Step 5: Solve for x
    x = 411,075,625/15,090
  6. Step 6: Final answer
    x = 27,241.59

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.