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Finding the Third Proportional to 7,989.75 and 18,661.50

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Solution

The third proportional to 7,989.75 and 18,661.50 is: 43,587.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,989.75 : 18,661.50 = 18,661.50 : x
  2. Step 2: Convert to fraction form
    7,989.75/18,661.50 = 18,661.50/x
  3. Step 3: Cross multiply
    7,989.75x = 18,661.50 × 18,661.50
  4. Step 4: Simplify right side
    7,989.75x = 348,251,582.25
  5. Step 5: Solve for x
    x = 348,251,582.25/7,989.75
  6. Step 6: Final answer
    x = 43,587.29

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.