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Finding the Third Proportional to 7,686.50 and 11,752.81

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Solution

The third proportional to 7,686.50 and 11,752.81 is: 17,970.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,686.50 : 11,752.81 = 11,752.81 : x
  2. Step 2: Convert to fraction form
    7,686.50/11,752.81 = 11,752.81/x
  3. Step 3: Cross multiply
    7,686.50x = 11,752.81 × 11,752.81
  4. Step 4: Simplify right side
    7,686.50x = 138,128,601.66
  5. Step 5: Solve for x
    x = 138,128,601.66/7,686.50
  6. Step 6: Final answer
    x = 17,970.29

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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.