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Finding the Third Proportional to 15,031 and 21,365

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Solution

The third proportional to 15,031 and 21,365 is: 30,368.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,031 : 21,365 = 21,365 : x
  2. Step 2: Convert to fraction form
    15,031/21,365 = 21,365/x
  3. Step 3: Cross multiply
    15,031x = 21,365 × 21,365
  4. Step 4: Simplify right side
    15,031x = 456,463,225
  5. Step 5: Solve for x
    x = 456,463,225/15,031
  6. Step 6: Final answer
    x = 30,368.12

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.