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Finding the Fourth Proportional to 18,998.52, 28,489.92 and 5,668.60

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Solution

The fourth proportional to 18,998.52, 28,489.92 and 5,668.60 is: 8,500.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.52 : 28,489.92 = 5,668.60 : x
  2. Step 2: Convert to fraction form
    18,998.52/28,489.92 = 5,668.60/x
  3. Step 3: Cross multiply
    18,998.52x = 28,489.92 × 5,668.60
  4. Step 4: Simplify right side
    18,998.52x = 161,497,960.51
  5. Step 5: Solve for x
    x = 161,497,960.51/18,998.52
  6. Step 6: Final answer
    x = 8,500.55

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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.