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Finding the Third Proportional to 7,212 and 9,643.50

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Solution

The third proportional to 7,212 and 9,643.50 is: 12,894.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,212 : 9,643.50 = 9,643.50 : x
  2. Step 2: Convert to fraction form
    7,212/9,643.50 = 9,643.50/x
  3. Step 3: Cross multiply
    7,212x = 9,643.50 × 9,643.50
  4. Step 4: Simplify right side
    7,212x = 92,997,092.25
  5. Step 5: Solve for x
    x = 92,997,092.25/7,212
  6. Step 6: Final answer
    x = 12,894.77

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.