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Finding the Fourth Proportional to 11,613.93, 17,420.89 and 5,039.97

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Solution

The fourth proportional to 11,613.93, 17,420.89 and 5,039.97 is: 7,559.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,613.93 : 17,420.89 = 5,039.97 : x
  2. Step 2: Convert to fraction form
    11,613.93/17,420.89 = 5,039.97/x
  3. Step 3: Cross multiply
    11,613.93x = 17,420.89 × 5,039.97
  4. Step 4: Simplify right side
    11,613.93x = 87,800,760.10
  5. Step 5: Solve for x
    x = 87,800,760.10/11,613.93
  6. Step 6: Final answer
    x = 7,559.95

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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.