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Finding the Fourth Proportional to 7,207.70, 10,805.15 and 3,877.77

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Solution

The fourth proportional to 7,207.70, 10,805.15 and 3,877.77 is: 5,813.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,207.70 : 10,805.15 = 3,877.77 : x
  2. Step 2: Convert to fraction form
    7,207.70/10,805.15 = 3,877.77/x
  3. Step 3: Cross multiply
    7,207.70x = 10,805.15 × 3,877.77
  4. Step 4: Simplify right side
    7,207.70x = 41,899,846.54
  5. Step 5: Solve for x
    x = 41,899,846.54/7,207.70
  6. Step 6: Final answer
    x = 5,813.20

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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.