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Finding the Third Proportional to 4,690.09 and 9,918.39

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Solution

The third proportional to 4,690.09 and 9,918.39 is: 20,974.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,690.09 : 9,918.39 = 9,918.39 : x
  2. Step 2: Convert to fraction form
    4,690.09/9,918.39 = 9,918.39/x
  3. Step 3: Cross multiply
    4,690.09x = 9,918.39 × 9,918.39
  4. Step 4: Simplify right side
    4,690.09x = 98,374,395.10
  5. Step 5: Solve for x
    x = 98,374,395.10/4,690.09
  6. Step 6: Final answer
    x = 20,974.95

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.