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Finding the Third Proportional to 5,642.50 and 12,379

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Solution

The third proportional to 5,642.50 and 12,379 is: 27,158.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,642.50 : 12,379 = 12,379 : x
  2. Step 2: Convert to fraction form
    5,642.50/12,379 = 12,379/x
  3. Step 3: Cross multiply
    5,642.50x = 12,379 × 12,379
  4. Step 4: Simplify right side
    5,642.50x = 153,239,641
  5. Step 5: Solve for x
    x = 153,239,641/5,642.50
  6. Step 6: Final answer
    x = 27,158.11

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.