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Finding the Third Proportional to 6,400 and 13,440

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Solution

The third proportional to 6,400 and 13,440 is: 28,224

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,400 : 13,440 = 13,440 : x
  2. Step 2: Convert to fraction form
    6,400/13,440 = 13,440/x
  3. Step 3: Cross multiply
    6,400x = 13,440 × 13,440
  4. Step 4: Simplify right side
    6,400x = 180,633,600
  5. Step 5: Solve for x
    x = 180,633,600/6,400
  6. Step 6: Final answer
    x = 28,224

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.