Home / 3,939.70-5,909.55-2,208.10

Finding the Fourth Proportional to 3,939.70, 5,909.55 and 2,208.10

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Solution

The fourth proportional to 3,939.70, 5,909.55 and 2,208.10 is: 3,312.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.70 : 5,909.55 = 2,208.10 : x
  2. Step 2: Convert to fraction form
    3,939.70/5,909.55 = 2,208.10/x
  3. Step 3: Cross multiply
    3,939.70x = 5,909.55 × 2,208.10
  4. Step 4: Simplify right side
    3,939.70x = 13,048,877.36
  5. Step 5: Solve for x
    x = 13,048,877.36/3,939.70
  6. Step 6: Final answer
    x = 3,312.15

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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.