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Finding the Fourth Proportional to 18,891.92, 28,338.89 and 5,743.29

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Solution

The fourth proportional to 18,891.92, 28,338.89 and 5,743.29 is: 8,615.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.92 : 28,338.89 = 5,743.29 : x
  2. Step 2: Convert to fraction form
    18,891.92/28,338.89 = 5,743.29/x
  3. Step 3: Cross multiply
    18,891.92x = 28,338.89 × 5,743.29
  4. Step 4: Simplify right side
    18,891.92x = 162,758,434.83
  5. Step 5: Solve for x
    x = 162,758,434.83/18,891.92
  6. Step 6: Final answer
    x = 8,615.24

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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.