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Finding the Fourth Proportional to 18,735.17, 28,103.83 and 7,048.49

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Solution

The fourth proportional to 18,735.17, 28,103.83 and 7,048.49 is: 10,573.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,735.17 : 28,103.83 = 7,048.49 : x
  2. Step 2: Convert to fraction form
    18,735.17/28,103.83 = 7,048.49/x
  3. Step 3: Cross multiply
    18,735.17x = 28,103.83 × 7,048.49
  4. Step 4: Simplify right side
    18,735.17x = 198,089,564.72
  5. Step 5: Solve for x
    x = 198,089,564.72/18,735.17
  6. Step 6: Final answer
    x = 10,573.14

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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.