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Finding the Third Proportional to 6,428 and 10,187

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Solution

The third proportional to 6,428 and 10,187 is: 16,144.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428 : 10,187 = 10,187 : x
  2. Step 2: Convert to fraction form
    6,428/10,187 = 10,187/x
  3. Step 3: Cross multiply
    6,428x = 10,187 × 10,187
  4. Step 4: Simplify right side
    6,428x = 103,774,969
  5. Step 5: Solve for x
    x = 103,774,969/6,428
  6. Step 6: Final answer
    x = 16,144.21

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.