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Finding the Third Proportional to 7,689 and 14,221.50

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Solution

The third proportional to 7,689 and 14,221.50 is: 26,303.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,689 : 14,221.50 = 14,221.50 : x
  2. Step 2: Convert to fraction form
    7,689/14,221.50 = 14,221.50/x
  3. Step 3: Cross multiply
    7,689x = 14,221.50 × 14,221.50
  4. Step 4: Simplify right side
    7,689x = 202,251,062.25
  5. Step 5: Solve for x
    x = 202,251,062.25/7,689
  6. Step 6: Final answer
    x = 26,303.95

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Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.