Home / 8,320.85-12,487.43-3,938.31

Finding the Fourth Proportional to 8,320.85, 12,487.43 and 3,938.31

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Solution

The fourth proportional to 8,320.85, 12,487.43 and 3,938.31 is: 5,910.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.85 : 12,487.43 = 3,938.31 : x
  2. Step 2: Convert to fraction form
    8,320.85/12,487.43 = 3,938.31/x
  3. Step 3: Cross multiply
    8,320.85x = 12,487.43 × 3,938.31
  4. Step 4: Simplify right side
    8,320.85x = 49,179,346.11
  5. Step 5: Solve for x
    x = 49,179,346.11/8,320.85
  6. Step 6: Final answer
    x = 5,910.37

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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.