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Finding the Third Proportional to 15,720 and 34,355

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Solution

The third proportional to 15,720 and 34,355 is: 75,080.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720 : 34,355 = 34,355 : x
  2. Step 2: Convert to fraction form
    15,720/34,355 = 34,355/x
  3. Step 3: Cross multiply
    15,720x = 34,355 × 34,355
  4. Step 4: Simplify right side
    15,720x = 1,180,266,025
  5. Step 5: Solve for x
    x = 1,180,266,025/15,720
  6. Step 6: Final answer
    x = 75,080.54

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.