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Finding the Fourth Proportional to 7,221.21, 9,965.26 and 4,077.39

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Solution

The fourth proportional to 7,221.21, 9,965.26 and 4,077.39 is: 5,626.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.21 : 9,965.26 = 4,077.39 : x
  2. Step 2: Convert to fraction form
    7,221.21/9,965.26 = 4,077.39/x
  3. Step 3: Cross multiply
    7,221.21x = 9,965.26 × 4,077.39
  4. Step 4: Simplify right side
    7,221.21x = 40,632,251.47
  5. Step 5: Solve for x
    x = 40,632,251.47/7,221.21
  6. Step 6: Final answer
    x = 5,626.79

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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.