Home / 3,930.29-5,420.96-2,669.15

Finding the Fourth Proportional to 3,930.29, 5,420.96 and 2,669.15

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Solution

The fourth proportional to 3,930.29, 5,420.96 and 2,669.15 is: 3,681.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.29 : 5,420.96 = 2,669.15 : x
  2. Step 2: Convert to fraction form
    3,930.29/5,420.96 = 2,669.15/x
  3. Step 3: Cross multiply
    3,930.29x = 5,420.96 × 2,669.15
  4. Step 4: Simplify right side
    3,930.29x = 14,469,355.38
  5. Step 5: Solve for x
    x = 14,469,355.38/3,930.29
  6. Step 6: Final answer
    x = 3,681.50

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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.