Home / 3,935.78-5,431.30-2,167.35

Finding the Fourth Proportional to 3,935.78, 5,431.30 and 2,167.35

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Solution

The fourth proportional to 3,935.78, 5,431.30 and 2,167.35 is: 2,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.78 : 5,431.30 = 2,167.35 : x
  2. Step 2: Convert to fraction form
    3,935.78/5,431.30 = 2,167.35/x
  3. Step 3: Cross multiply
    3,935.78x = 5,431.30 × 2,167.35
  4. Step 4: Simplify right side
    3,935.78x = 11,771,528.06
  5. Step 5: Solve for x
    x = 11,771,528.06/3,935.78
  6. Step 6: Final answer
    x = 2,990.90

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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.