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Finding the Third Proportional to 6,390 and 13,218.75

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Solution

The third proportional to 6,390 and 13,218.75 is: 27,345.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390 : 13,218.75 = 13,218.75 : x
  2. Step 2: Convert to fraction form
    6,390/13,218.75 = 13,218.75/x
  3. Step 3: Cross multiply
    6,390x = 13,218.75 × 13,218.75
  4. Step 4: Simplify right side
    6,390x = 174,735,351.56
  5. Step 5: Solve for x
    x = 174,735,351.56/6,390
  6. Step 6: Final answer
    x = 27,345.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.