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Finding the Third Proportional to 6,440 and 11,028

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Solution

The third proportional to 6,440 and 11,028 is: 18,884.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,440 : 11,028 = 11,028 : x
  2. Step 2: Convert to fraction form
    6,440/11,028 = 11,028/x
  3. Step 3: Cross multiply
    6,440x = 11,028 × 11,028
  4. Step 4: Simplify right side
    6,440x = 121,616,784
  5. Step 5: Solve for x
    x = 121,616,784/6,440
  6. Step 6: Final answer
    x = 18,884.59

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Why These Related Problems?

These problems maintain the same ratio (1.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.