Home / 7,489.72-11,235.78-2,811.34

Finding the Fourth Proportional to 7,489.72, 11,235.78 and 2,811.34

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Solution

The fourth proportional to 7,489.72, 11,235.78 and 2,811.34 is: 4,217.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,489.72 : 11,235.78 = 2,811.34 : x
  2. Step 2: Convert to fraction form
    7,489.72/11,235.78 = 2,811.34/x
  3. Step 3: Cross multiply
    7,489.72x = 11,235.78 × 2,811.34
  4. Step 4: Simplify right side
    7,489.72x = 31,587,597.75
  5. Step 5: Solve for x
    x = 31,587,597.75/7,489.72
  6. Step 6: Final answer
    x = 4,217.46

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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.