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Finding the Third Proportional to 2,156 and 3,642

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Solution

The third proportional to 2,156 and 3,642 is: 6,152.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156 : 3,642 = 3,642 : x
  2. Step 2: Convert to fraction form
    2,156/3,642 = 3,642/x
  3. Step 3: Cross multiply
    2,156x = 3,642 × 3,642
  4. Step 4: Simplify right side
    2,156x = 13,264,164
  5. Step 5: Solve for x
    x = 13,264,164/2,156
  6. Step 6: Final answer
    x = 6,152.21

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Why These Related Problems?

These problems maintain the same ratio (1.69) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.