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Finding the Fourth Proportional to 5,518.56, 7,609.42 and 5,168.64

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Solution

The fourth proportional to 5,518.56, 7,609.42 and 5,168.64 is: 7,126.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,518.56 : 7,609.42 = 5,168.64 : x
  2. Step 2: Convert to fraction form
    5,518.56/7,609.42 = 5,168.64/x
  3. Step 3: Cross multiply
    5,518.56x = 7,609.42 × 5,168.64
  4. Step 4: Simplify right side
    5,518.56x = 39,330,352.59
  5. Step 5: Solve for x
    x = 39,330,352.59/5,518.56
  6. Step 6: Final answer
    x = 7,126.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.