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Finding the Third Proportional to 7,321.50 and 11,355.75

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Solution

The third proportional to 7,321.50 and 11,355.75 is: 17,612.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.50 : 11,355.75 = 11,355.75 : x
  2. Step 2: Convert to fraction form
    7,321.50/11,355.75 = 11,355.75/x
  3. Step 3: Cross multiply
    7,321.50x = 11,355.75 × 11,355.75
  4. Step 4: Simplify right side
    7,321.50x = 128,953,058.06
  5. Step 5: Solve for x
    x = 128,953,058.06/7,321.50
  6. Step 6: Final answer
    x = 17,612.93

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.