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Finding the Third Proportional to 12,579 and 18,871.50

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Solution

The third proportional to 12,579 and 18,871.50 is: 28,311.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579 : 18,871.50 = 18,871.50 : x
  2. Step 2: Convert to fraction form
    12,579/18,871.50 = 18,871.50/x
  3. Step 3: Cross multiply
    12,579x = 18,871.50 × 18,871.50
  4. Step 4: Simplify right side
    12,579x = 356,133,512.25
  5. Step 5: Solve for x
    x = 356,133,512.25/12,579
  6. Step 6: Final answer
    x = 28,311.75

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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.