Home / 3,939.72-5,909.25-1,306.36

Finding the Fourth Proportional to 3,939.72, 5,909.25 and 1,306.36

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Solution

The fourth proportional to 3,939.72, 5,909.25 and 1,306.36 is: 1,959.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.72 : 5,909.25 = 1,306.36 : x
  2. Step 2: Convert to fraction form
    3,939.72/5,909.25 = 1,306.36/x
  3. Step 3: Cross multiply
    3,939.72x = 5,909.25 × 1,306.36
  4. Step 4: Simplify right side
    3,939.72x = 7,719,607.83
  5. Step 5: Solve for x
    x = 7,719,607.83/3,939.72
  6. Step 6: Final answer
    x = 1,959.43

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1.5x scale

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.