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Finding the Third Proportional to 7,938 and 11,677.50

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Solution

The third proportional to 7,938 and 11,677.50 is: 17,178.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,938 : 11,677.50 = 11,677.50 : x
  2. Step 2: Convert to fraction form
    7,938/11,677.50 = 11,677.50/x
  3. Step 3: Cross multiply
    7,938x = 11,677.50 × 11,677.50
  4. Step 4: Simplify right side
    7,938x = 136,364,006.25
  5. Step 5: Solve for x
    x = 136,364,006.25/7,938
  6. Step 6: Final answer
    x = 17,178.64

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.