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Finding the Third Proportional to 9,639 and 19,930.50

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Solution

The third proportional to 9,639 and 19,930.50 is: 41,210.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,639 : 19,930.50 = 19,930.50 : x
  2. Step 2: Convert to fraction form
    9,639/19,930.50 = 19,930.50/x
  3. Step 3: Cross multiply
    9,639x = 19,930.50 × 19,930.50
  4. Step 4: Simplify right side
    9,639x = 397,224,830.25
  5. Step 5: Solve for x
    x = 397,224,830.25/9,639
  6. Step 6: Final answer
    x = 41,210.17

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.