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Finding the Third Proportional to 7,690.50 and 14,787

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Solution

The third proportional to 7,690.50 and 14,787 is: 28,431.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,690.50 : 14,787 = 14,787 : x
  2. Step 2: Convert to fraction form
    7,690.50/14,787 = 14,787/x
  3. Step 3: Cross multiply
    7,690.50x = 14,787 × 14,787
  4. Step 4: Simplify right side
    7,690.50x = 218,655,369
  5. Step 5: Solve for x
    x = 218,655,369/7,690.50
  6. Step 6: Final answer
    x = 28,431.88

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Why These Related Problems?

These problems maintain the same ratio (1.92) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.