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Finding the Third Proportional to 6,378.75 and 11,389.50

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Solution

The third proportional to 6,378.75 and 11,389.50 is: 20,336.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,378.75 : 11,389.50 = 11,389.50 : x
  2. Step 2: Convert to fraction form
    6,378.75/11,389.50 = 11,389.50/x
  3. Step 3: Cross multiply
    6,378.75x = 11,389.50 × 11,389.50
  4. Step 4: Simplify right side
    6,378.75x = 129,720,710.25
  5. Step 5: Solve for x
    x = 129,720,710.25/6,378.75
  6. Step 6: Final answer
    x = 20,336.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.