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Finding the Third Proportional to 6,240 and 12,784

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Solution

The third proportional to 6,240 and 12,784 is: 26,190.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,240 : 12,784 = 12,784 : x
  2. Step 2: Convert to fraction form
    6,240/12,784 = 12,784/x
  3. Step 3: Cross multiply
    6,240x = 12,784 × 12,784
  4. Step 4: Simplify right side
    6,240x = 163,430,656
  5. Step 5: Solve for x
    x = 163,430,656/6,240
  6. Step 6: Final answer
    x = 26,190.81

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.