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Finding the Third Proportional to 7,690 and 18,146

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Solution

The third proportional to 7,690 and 18,146 is: 42,818.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,690 : 18,146 = 18,146 : x
  2. Step 2: Convert to fraction form
    7,690/18,146 = 18,146/x
  3. Step 3: Cross multiply
    7,690x = 18,146 × 18,146
  4. Step 4: Simplify right side
    7,690x = 329,277,316
  5. Step 5: Solve for x
    x = 329,277,316/7,690
  6. Step 6: Final answer
    x = 42,818.90

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.