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Finding the Third Proportional to 4,992.50 and 7,889

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Solution

The third proportional to 4,992.50 and 7,889 is: 12,465.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,992.50 : 7,889 = 7,889 : x
  2. Step 2: Convert to fraction form
    4,992.50/7,889 = 7,889/x
  3. Step 3: Cross multiply
    4,992.50x = 7,889 × 7,889
  4. Step 4: Simplify right side
    4,992.50x = 62,236,321
  5. Step 5: Solve for x
    x = 62,236,321/4,992.50
  6. Step 6: Final answer
    x = 12,465.96

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.