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Finding the Third Proportional to 1,921.50 and 5,181.75

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Solution

The third proportional to 1,921.50 and 5,181.75 is: 13,973.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.50 : 5,181.75 = 5,181.75 : x
  2. Step 2: Convert to fraction form
    1,921.50/5,181.75 = 5,181.75/x
  3. Step 3: Cross multiply
    1,921.50x = 5,181.75 × 5,181.75
  4. Step 4: Simplify right side
    1,921.50x = 26,850,533.06
  5. Step 5: Solve for x
    x = 26,850,533.06/1,921.50
  6. Step 6: Final answer
    x = 13,973.74

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Why These Related Problems?

These problems maintain the same ratio (2.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.