Home / 3,934.39-5,431.17-2,990.35

Finding the Fourth Proportional to 3,934.39, 5,431.17 and 2,990.35

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Solution

The fourth proportional to 3,934.39, 5,431.17 and 2,990.35 is: 4,127.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.39 : 5,431.17 = 2,990.35 : x
  2. Step 2: Convert to fraction form
    3,934.39/5,431.17 = 2,990.35/x
  3. Step 3: Cross multiply
    3,934.39x = 5,431.17 × 2,990.35
  4. Step 4: Simplify right side
    3,934.39x = 16,241,099.21
  5. Step 5: Solve for x
    x = 16,241,099.21/3,934.39
  6. Step 6: Final answer
    x = 4,127.98

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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.