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Finding the Fourth Proportional to 18,496.70, 27,749.10 and 7,400.60

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Solution

The fourth proportional to 18,496.70, 27,749.10 and 7,400.60 is: 11,102.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,496.70 : 27,749.10 = 7,400.60 : x
  2. Step 2: Convert to fraction form
    18,496.70/27,749.10 = 7,400.60/x
  3. Step 3: Cross multiply
    18,496.70x = 27,749.10 × 7,400.60
  4. Step 4: Simplify right side
    18,496.70x = 205,359,989.46
  5. Step 5: Solve for x
    x = 205,359,989.46/18,496.70
  6. Step 6: Final answer
    x = 11,102.52

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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.