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Finding the Fourth Proportional to 18,791.92, 28,167.50 and 9,409.31

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Solution

The fourth proportional to 18,791.92, 28,167.50 and 9,409.31 is: 14,103.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.92 : 28,167.50 = 9,409.31 : x
  2. Step 2: Convert to fraction form
    18,791.92/28,167.50 = 9,409.31/x
  3. Step 3: Cross multiply
    18,791.92x = 28,167.50 × 9,409.31
  4. Step 4: Simplify right side
    18,791.92x = 265,036,798.01
  5. Step 5: Solve for x
    x = 265,036,798.01/18,791.92
  6. Step 6: Final answer
    x = 14,103.77

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1.5x scale

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.