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Finding the Third Proportional to 12,420 and 18,749.25

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Solution

The third proportional to 12,420 and 18,749.25 is: 28,303.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420 : 18,749.25 = 18,749.25 : x
  2. Step 2: Convert to fraction form
    12,420/18,749.25 = 18,749.25/x
  3. Step 3: Cross multiply
    12,420x = 18,749.25 × 18,749.25
  4. Step 4: Simplify right side
    12,420x = 351,534,375.56
  5. Step 5: Solve for x
    x = 351,534,375.56/12,420
  6. Step 6: Final answer
    x = 28,303.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.