Home / 7,421.27-11,128.31-2,743.49

Finding the Fourth Proportional to 7,421.27, 11,128.31 and 2,743.49

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Solution

The fourth proportional to 7,421.27, 11,128.31 and 2,743.49 is: 4,113.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.27 : 11,128.31 = 2,743.49 : x
  2. Step 2: Convert to fraction form
    7,421.27/11,128.31 = 2,743.49/x
  3. Step 3: Cross multiply
    7,421.27x = 11,128.31 × 2,743.49
  4. Step 4: Simplify right side
    7,421.27x = 30,530,337.84
  5. Step 5: Solve for x
    x = 30,530,337.84/7,421.27
  6. Step 6: Final answer
    x = 4,113.90

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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.