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Finding the Fourth Proportional to 7,221.29, 10,813.64 and 4,878.77

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Solution

The fourth proportional to 7,221.29, 10,813.64 and 4,878.77 is: 7,305.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.29 : 10,813.64 = 4,878.77 : x
  2. Step 2: Convert to fraction form
    7,221.29/10,813.64 = 4,878.77/x
  3. Step 3: Cross multiply
    7,221.29x = 10,813.64 × 4,878.77
  4. Step 4: Simplify right side
    7,221.29x = 52,757,183.96
  5. Step 5: Solve for x
    x = 52,757,183.96/7,221.29
  6. Step 6: Final answer
    x = 7,305.79

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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.