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Finding the Third Proportional to 12,912 and 19,854

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Solution

The third proportional to 12,912 and 19,854 is: 30,528.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912 : 19,854 = 19,854 : x
  2. Step 2: Convert to fraction form
    12,912/19,854 = 19,854/x
  3. Step 3: Cross multiply
    12,912x = 19,854 × 19,854
  4. Step 4: Simplify right side
    12,912x = 394,181,316
  5. Step 5: Solve for x
    x = 394,181,316/12,912
  6. Step 6: Final answer
    x = 30,528.29

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.