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Finding the Third Proportional to 20,640 and 43,944

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Solution

The third proportional to 20,640 and 43,944 is: 93,559.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640 : 43,944 = 43,944 : x
  2. Step 2: Convert to fraction form
    20,640/43,944 = 43,944/x
  3. Step 3: Cross multiply
    20,640x = 43,944 × 43,944
  4. Step 4: Simplify right side
    20,640x = 1,931,075,136
  5. Step 5: Solve for x
    x = 1,931,075,136/20,640
  6. Step 6: Final answer
    x = 93,559.84

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.