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Finding the Third Proportional to 18,960 and 28,905

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Solution

The third proportional to 18,960 and 28,905 is: 44,066.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,960 : 28,905 = 28,905 : x
  2. Step 2: Convert to fraction form
    18,960/28,905 = 28,905/x
  3. Step 3: Cross multiply
    18,960x = 28,905 × 28,905
  4. Step 4: Simplify right side
    18,960x = 835,499,025
  5. Step 5: Solve for x
    x = 835,499,025/18,960
  6. Step 6: Final answer
    x = 44,066.40

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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.