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Finding the Third Proportional to 4,155 and 9,091

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Solution

The third proportional to 4,155 and 9,091 is: 19,890.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,155 : 9,091 = 9,091 : x
  2. Step 2: Convert to fraction form
    4,155/9,091 = 9,091/x
  3. Step 3: Cross multiply
    4,155x = 9,091 × 9,091
  4. Step 4: Simplify right side
    4,155x = 82,646,281
  5. Step 5: Solve for x
    x = 82,646,281/4,155
  6. Step 6: Final answer
    x = 19,890.80

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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.