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Finding the Fourth Proportional to 18,960.27, 28,440.42 and 5,109.27

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Solution

The fourth proportional to 18,960.27, 28,440.42 and 5,109.27 is: 7,663.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,960.27 : 28,440.42 = 5,109.27 : x
  2. Step 2: Convert to fraction form
    18,960.27/28,440.42 = 5,109.27/x
  3. Step 3: Cross multiply
    18,960.27x = 28,440.42 × 5,109.27
  4. Step 4: Simplify right side
    18,960.27x = 145,309,784.69
  5. Step 5: Solve for x
    x = 145,309,784.69/18,960.27
  6. Step 6: Final answer
    x = 7,663.91

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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.