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Finding the Third Proportional to 4,478 and 9,818

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Solution

The third proportional to 4,478 and 9,818 is: 21,525.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,478 : 9,818 = 9,818 : x
  2. Step 2: Convert to fraction form
    4,478/9,818 = 9,818/x
  3. Step 3: Cross multiply
    4,478x = 9,818 × 9,818
  4. Step 4: Simplify right side
    4,478x = 96,393,124
  5. Step 5: Solve for x
    x = 96,393,124/4,478
  6. Step 6: Final answer
    x = 21,525.93

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.