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Finding the Third Proportional to 3,557 and 8,426

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Solution

The third proportional to 3,557 and 8,426 is: 19,959.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,557 : 8,426 = 8,426 : x
  2. Step 2: Convert to fraction form
    3,557/8,426 = 8,426/x
  3. Step 3: Cross multiply
    3,557x = 8,426 × 8,426
  4. Step 4: Simplify right side
    3,557x = 70,997,476
  5. Step 5: Solve for x
    x = 70,997,476/3,557
  6. Step 6: Final answer
    x = 19,959.93

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Why These Related Problems?

These problems maintain the same ratio (2.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.