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Finding the Fourth Proportional to 7,765.76, 10,716.72 and 4,228.94

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Solution

The fourth proportional to 7,765.76, 10,716.72 and 4,228.94 is: 5,835.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,765.76 : 10,716.72 = 4,228.94 : x
  2. Step 2: Convert to fraction form
    7,765.76/10,716.72 = 4,228.94/x
  3. Step 3: Cross multiply
    7,765.76x = 10,716.72 × 4,228.94
  4. Step 4: Simplify right side
    7,765.76x = 45,320,365.88
  5. Step 5: Solve for x
    x = 45,320,365.88/7,765.76
  6. Step 6: Final answer
    x = 5,835.92

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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.