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Finding the Third Proportional to 7,965 and 12,172.50

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Solution

The third proportional to 7,965 and 12,172.50 is: 18,602.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,965 : 12,172.50 = 12,172.50 : x
  2. Step 2: Convert to fraction form
    7,965/12,172.50 = 12,172.50/x
  3. Step 3: Cross multiply
    7,965x = 12,172.50 × 12,172.50
  4. Step 4: Simplify right side
    7,965x = 148,169,756.25
  5. Step 5: Solve for x
    x = 148,169,756.25/7,965
  6. Step 6: Final answer
    x = 18,602.61

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.