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Finding the Third Proportional to 7,707.50 and 11,957.50

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Solution

The third proportional to 7,707.50 and 11,957.50 is: 18,551.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,707.50 : 11,957.50 = 11,957.50 : x
  2. Step 2: Convert to fraction form
    7,707.50/11,957.50 = 11,957.50/x
  3. Step 3: Cross multiply
    7,707.50x = 11,957.50 × 11,957.50
  4. Step 4: Simplify right side
    7,707.50x = 142,981,806.25
  5. Step 5: Solve for x
    x = 142,981,806.25/7,707.50
  6. Step 6: Final answer
    x = 18,551.00

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.