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Finding the Third Proportional to 7,378.50 and 10,719

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Solution

The third proportional to 7,378.50 and 10,719 is: 15,571.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,378.50 : 10,719 = 10,719 : x
  2. Step 2: Convert to fraction form
    7,378.50/10,719 = 10,719/x
  3. Step 3: Cross multiply
    7,378.50x = 10,719 × 10,719
  4. Step 4: Simplify right side
    7,378.50x = 114,896,961
  5. Step 5: Solve for x
    x = 114,896,961/7,378.50
  6. Step 6: Final answer
    x = 15,571.86

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.