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Finding the Third Proportional to 9,678.75 and 12,603.75

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Solution

The third proportional to 9,678.75 and 12,603.75 is: 16,412.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,678.75 : 12,603.75 = 12,603.75 : x
  2. Step 2: Convert to fraction form
    9,678.75/12,603.75 = 12,603.75/x
  3. Step 3: Cross multiply
    9,678.75x = 12,603.75 × 12,603.75
  4. Step 4: Simplify right side
    9,678.75x = 158,854,514.06
  5. Step 5: Solve for x
    x = 158,854,514.06/9,678.75
  6. Step 6: Final answer
    x = 16,412.71

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.