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Finding the Third Proportional to 13,090 and 16,800

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Solution

The third proportional to 13,090 and 16,800 is: 21,561.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090 : 16,800 = 16,800 : x
  2. Step 2: Convert to fraction form
    13,090/16,800 = 16,800/x
  3. Step 3: Cross multiply
    13,090x = 16,800 × 16,800
  4. Step 4: Simplify right side
    13,090x = 282,240,000
  5. Step 5: Solve for x
    x = 282,240,000/13,090
  6. Step 6: Final answer
    x = 21,561.50

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.