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Finding the Third Proportional to 7,799.63 and 11,989.13

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Solution

The third proportional to 7,799.63 and 11,989.13 is: 18,428.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,799.63 : 11,989.13 = 11,989.13 : x
  2. Step 2: Convert to fraction form
    7,799.63/11,989.13 = 11,989.13/x
  3. Step 3: Cross multiply
    7,799.63x = 11,989.13 × 11,989.13
  4. Step 4: Simplify right side
    7,799.63x = 143,739,118.27
  5. Step 5: Solve for x
    x = 143,739,118.27/7,799.63
  6. Step 6: Final answer
    x = 18,428.98

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.