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Finding the Third Proportional to 7,740 and 18,700

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Solution

The third proportional to 7,740 and 18,700 is: 45,179.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,740 : 18,700 = 18,700 : x
  2. Step 2: Convert to fraction form
    7,740/18,700 = 18,700/x
  3. Step 3: Cross multiply
    7,740x = 18,700 × 18,700
  4. Step 4: Simplify right side
    7,740x = 349,690,000
  5. Step 5: Solve for x
    x = 349,690,000/7,740
  6. Step 6: Final answer
    x = 45,179.59

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.