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Finding the Third Proportional to 12,438.56 and 18,855.28

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Solution

The third proportional to 12,438.56 and 18,855.28 is: 28,582.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.56 : 18,855.28 = 18,855.28 : x
  2. Step 2: Convert to fraction form
    12,438.56/18,855.28 = 18,855.28/x
  3. Step 3: Cross multiply
    12,438.56x = 18,855.28 × 18,855.28
  4. Step 4: Simplify right side
    12,438.56x = 355,521,631.02
  5. Step 5: Solve for x
    x = 355,521,631.02/12,438.56
  6. Step 6: Final answer
    x = 28,582.21

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.