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Finding the Third Proportional to 6,420 and 11,352

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Solution

The third proportional to 6,420 and 11,352 is: 20,072.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420 : 11,352 = 11,352 : x
  2. Step 2: Convert to fraction form
    6,420/11,352 = 11,352/x
  3. Step 3: Cross multiply
    6,420x = 11,352 × 11,352
  4. Step 4: Simplify right side
    6,420x = 128,867,904
  5. Step 5: Solve for x
    x = 128,867,904/6,420
  6. Step 6: Final answer
    x = 20,072.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.