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Finding the Third Proportional to 11,220 and 13,285.50

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Solution

The third proportional to 11,220 and 13,285.50 is: 15,731.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,220 : 13,285.50 = 13,285.50 : x
  2. Step 2: Convert to fraction form
    11,220/13,285.50 = 13,285.50/x
  3. Step 3: Cross multiply
    11,220x = 13,285.50 × 13,285.50
  4. Step 4: Simplify right side
    11,220x = 176,504,510.25
  5. Step 5: Solve for x
    x = 176,504,510.25/11,220
  6. Step 6: Final answer
    x = 15,731.24

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.