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Finding the Third Proportional to 4,558 and 7,890

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Solution

The third proportional to 4,558 and 7,890 is: 13,657.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,558 : 7,890 = 7,890 : x
  2. Step 2: Convert to fraction form
    4,558/7,890 = 7,890/x
  3. Step 3: Cross multiply
    4,558x = 7,890 × 7,890
  4. Step 4: Simplify right side
    4,558x = 62,252,100
  5. Step 5: Solve for x
    x = 62,252,100/4,558
  6. Step 6: Final answer
    x = 13,657.77

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Why These Related Problems?

These problems maintain the same ratio (1.73) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.