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Finding the Fourth Proportional to 20,492.40, 30,738.60 and 7,340.04

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Solution

The fourth proportional to 20,492.40, 30,738.60 and 7,340.04 is: 11,010.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,492.40 : 30,738.60 = 7,340.04 : x
  2. Step 2: Convert to fraction form
    20,492.40/30,738.60 = 7,340.04/x
  3. Step 3: Cross multiply
    20,492.40x = 30,738.60 × 7,340.04
  4. Step 4: Simplify right side
    20,492.40x = 225,622,553.54
  5. Step 5: Solve for x
    x = 225,622,553.54/20,492.40
  6. Step 6: Final answer
    x = 11,010.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.