Home / 3,939.54-5,431.28-3,377.58

Finding the Fourth Proportional to 3,939.54, 5,431.28 and 3,377.58

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Solution

The fourth proportional to 3,939.54, 5,431.28 and 3,377.58 is: 4,656.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.54 : 5,431.28 = 3,377.58 : x
  2. Step 2: Convert to fraction form
    3,939.54/5,431.28 = 3,377.58/x
  3. Step 3: Cross multiply
    3,939.54x = 5,431.28 × 3,377.58
  4. Step 4: Simplify right side
    3,939.54x = 18,344,565.81
  5. Step 5: Solve for x
    x = 18,344,565.81/3,939.54
  6. Step 6: Final answer
    x = 4,656.52

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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.