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Finding the Fourth Proportional to 18,735.18, 28,103.84 and 7,048.50

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Solution

The fourth proportional to 18,735.18, 28,103.84 and 7,048.50 is: 10,573.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,735.18 : 28,103.84 = 7,048.50 : x
  2. Step 2: Convert to fraction form
    18,735.18/28,103.84 = 7,048.50/x
  3. Step 3: Cross multiply
    18,735.18x = 28,103.84 × 7,048.50
  4. Step 4: Simplify right side
    18,735.18x = 198,089,916.24
  5. Step 5: Solve for x
    x = 198,089,916.24/18,735.18
  6. Step 6: Final answer
    x = 10,573.15

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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.