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Finding the Third Proportional to 12,670 and 19,724

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Solution

The third proportional to 12,670 and 19,724 is: 30,705.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,670 : 19,724 = 19,724 : x
  2. Step 2: Convert to fraction form
    12,670/19,724 = 19,724/x
  3. Step 3: Cross multiply
    12,670x = 19,724 × 19,724
  4. Step 4: Simplify right side
    12,670x = 389,036,176
  5. Step 5: Solve for x
    x = 389,036,176/12,670
  6. Step 6: Final answer
    x = 30,705.30

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.