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Finding the Third Proportional to 1,918.13 and 4,138.13

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Solution

The third proportional to 1,918.13 and 4,138.13 is: 8,927.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.13 : 4,138.13 = 4,138.13 : x
  2. Step 2: Convert to fraction form
    1,918.13/4,138.13 = 4,138.13/x
  3. Step 3: Cross multiply
    1,918.13x = 4,138.13 × 4,138.13
  4. Step 4: Simplify right side
    1,918.13x = 17,124,078.52
  5. Step 5: Solve for x
    x = 17,124,078.52/1,918.13
  6. Step 6: Final answer
    x = 8,927.51

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.