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Finding the Third Proportional to 7,851 and 12,628.50

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Solution

The third proportional to 7,851 and 12,628.50 is: 20,313.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,851 : 12,628.50 = 12,628.50 : x
  2. Step 2: Convert to fraction form
    7,851/12,628.50 = 12,628.50/x
  3. Step 3: Cross multiply
    7,851x = 12,628.50 × 12,628.50
  4. Step 4: Simplify right side
    7,851x = 159,479,012.25
  5. Step 5: Solve for x
    x = 159,479,012.25/7,851
  6. Step 6: Final answer
    x = 20,313.21

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.