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Finding the Third Proportional to 6,420 and 11,472

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Solution

The third proportional to 6,420 and 11,472 is: 20,499.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420 : 11,472 = 11,472 : x
  2. Step 2: Convert to fraction form
    6,420/11,472 = 11,472/x
  3. Step 3: Cross multiply
    6,420x = 11,472 × 11,472
  4. Step 4: Simplify right side
    6,420x = 131,606,784
  5. Step 5: Solve for x
    x = 131,606,784/6,420
  6. Step 6: Final answer
    x = 20,499.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.