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Finding the Third Proportional to 6,840 and 15,678

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Solution

The third proportional to 6,840 and 15,678 is: 35,935.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,840 : 15,678 = 15,678 : x
  2. Step 2: Convert to fraction form
    6,840/15,678 = 15,678/x
  3. Step 3: Cross multiply
    6,840x = 15,678 × 15,678
  4. Step 4: Simplify right side
    6,840x = 245,799,684
  5. Step 5: Solve for x
    x = 245,799,684/6,840
  6. Step 6: Final answer
    x = 35,935.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.