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Finding the Third Proportional to 12,480 and 18,768

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Solution

The third proportional to 12,480 and 18,768 is: 28,224.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480 : 18,768 = 18,768 : x
  2. Step 2: Convert to fraction form
    12,480/18,768 = 18,768/x
  3. Step 3: Cross multiply
    12,480x = 18,768 × 18,768
  4. Step 4: Simplify right side
    12,480x = 352,237,824
  5. Step 5: Solve for x
    x = 352,237,824/12,480
  6. Step 6: Final answer
    x = 28,224.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.