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Finding the Third Proportional to 9,905 and 15,386.50

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Solution

The third proportional to 9,905 and 15,386.50 is: 23,901.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,905 : 15,386.50 = 15,386.50 : x
  2. Step 2: Convert to fraction form
    9,905/15,386.50 = 15,386.50/x
  3. Step 3: Cross multiply
    9,905x = 15,386.50 × 15,386.50
  4. Step 4: Simplify right side
    9,905x = 236,744,382.25
  5. Step 5: Solve for x
    x = 236,744,382.25/9,905
  6. Step 6: Final answer
    x = 23,901.50

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.