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Finding the Third Proportional to 13,890 and 22,090

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Solution

The third proportional to 13,890 and 22,090 is: 35,130.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890 : 22,090 = 22,090 : x
  2. Step 2: Convert to fraction form
    13,890/22,090 = 22,090/x
  3. Step 3: Cross multiply
    13,890x = 22,090 × 22,090
  4. Step 4: Simplify right side
    13,890x = 487,968,100
  5. Step 5: Solve for x
    x = 487,968,100/13,890
  6. Step 6: Final answer
    x = 35,130.89

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.