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Finding the Third Proportional to 7,948.13 and 11,918.81

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Solution

The third proportional to 7,948.13 and 11,918.81 is: 17,873.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,948.13 : 11,918.81 = 11,918.81 : x
  2. Step 2: Convert to fraction form
    7,948.13/11,918.81 = 11,918.81/x
  3. Step 3: Cross multiply
    7,948.13x = 11,918.81 × 11,918.81
  4. Step 4: Simplify right side
    7,948.13x = 142,058,091.41
  5. Step 5: Solve for x
    x = 142,058,091.41/7,948.13
  6. Step 6: Final answer
    x = 17,873.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.