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Finding the Third Proportional to 14,008 and 21,120

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Solution

The third proportional to 14,008 and 21,120 is: 31,842.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,008 : 21,120 = 21,120 : x
  2. Step 2: Convert to fraction form
    14,008/21,120 = 21,120/x
  3. Step 3: Cross multiply
    14,008x = 21,120 × 21,120
  4. Step 4: Simplify right side
    14,008x = 446,054,400
  5. Step 5: Solve for x
    x = 446,054,400/14,008
  6. Step 6: Final answer
    x = 31,842.83

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.