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Finding the Third Proportional to 5,490 and 8,090

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Solution

The third proportional to 5,490 and 8,090 is: 11,921.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,490 : 8,090 = 8,090 : x
  2. Step 2: Convert to fraction form
    5,490/8,090 = 8,090/x
  3. Step 3: Cross multiply
    5,490x = 8,090 × 8,090
  4. Step 4: Simplify right side
    5,490x = 65,448,100
  5. Step 5: Solve for x
    x = 65,448,100/5,490
  6. Step 6: Final answer
    x = 11,921.33

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.