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Finding the Third Proportional to 4,620 and 9,888

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Solution

The third proportional to 4,620 and 9,888 is: 21,162.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,620 : 9,888 = 9,888 : x
  2. Step 2: Convert to fraction form
    4,620/9,888 = 9,888/x
  3. Step 3: Cross multiply
    4,620x = 9,888 × 9,888
  4. Step 4: Simplify right side
    4,620x = 97,772,544
  5. Step 5: Solve for x
    x = 97,772,544/4,620
  6. Step 6: Final answer
    x = 21,162.89

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.