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Finding the Third Proportional to 6,390 and 9,777

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Solution

The third proportional to 6,390 and 9,777 is: 14,959.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390 : 9,777 = 9,777 : x
  2. Step 2: Convert to fraction form
    6,390/9,777 = 9,777/x
  3. Step 3: Cross multiply
    6,390x = 9,777 × 9,777
  4. Step 4: Simplify right side
    6,390x = 95,589,729
  5. Step 5: Solve for x
    x = 95,589,729/6,390
  6. Step 6: Final answer
    x = 14,959.27

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.