Home / 3,939.61-5,903.85-2,185.39

Finding the Fourth Proportional to 3,939.61, 5,903.85 and 2,185.39

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Solution

The fourth proportional to 3,939.61, 5,903.85 and 2,185.39 is: 3,275.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.61 : 5,903.85 = 2,185.39 : x
  2. Step 2: Convert to fraction form
    3,939.61/5,903.85 = 2,185.39/x
  3. Step 3: Cross multiply
    3,939.61x = 5,903.85 × 2,185.39
  4. Step 4: Simplify right side
    3,939.61x = 12,902,214.75
  5. Step 5: Solve for x
    x = 12,902,214.75/3,939.61
  6. Step 6: Final answer
    x = 3,275.00

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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.