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Finding the Fourth Proportional to 18,756, 28,090.92 and 9,367.20

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Solution

The fourth proportional to 18,756, 28,090.92 and 9,367.20 is: 14,029.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756 : 28,090.92 = 9,367.20 : x
  2. Step 2: Convert to fraction form
    18,756/28,090.92 = 9,367.20/x
  3. Step 3: Cross multiply
    18,756x = 28,090.92 × 9,367.20
  4. Step 4: Simplify right side
    18,756x = 263,133,265.82
  5. Step 5: Solve for x
    x = 263,133,265.82/18,756
  6. Step 6: Final answer
    x = 14,029.28

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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.