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Finding the Third Proportional to 7,421 and 13,190

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Solution

The third proportional to 7,421 and 13,190 is: 23,443.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421 : 13,190 = 13,190 : x
  2. Step 2: Convert to fraction form
    7,421/13,190 = 13,190/x
  3. Step 3: Cross multiply
    7,421x = 13,190 × 13,190
  4. Step 4: Simplify right side
    7,421x = 173,976,100
  5. Step 5: Solve for x
    x = 173,976,100/7,421
  6. Step 6: Final answer
    x = 23,443.75

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.