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Finding the Third Proportional to 19,293.19 and 21,115.69

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Solution

The third proportional to 19,293.19 and 21,115.69 is: 23,110.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,293.19 : 21,115.69 = 21,115.69 : x
  2. Step 2: Convert to fraction form
    19,293.19/21,115.69 = 21,115.69/x
  3. Step 3: Cross multiply
    19,293.19x = 21,115.69 × 21,115.69
  4. Step 4: Simplify right side
    19,293.19x = 445,872,258.60
  5. Step 5: Solve for x
    x = 445,872,258.60/19,293.19
  6. Step 6: Final answer
    x = 23,110.35

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.