Home / 3,935.55-5,428.20-2,674.40

Finding the Fourth Proportional to 3,935.55, 5,428.20 and 2,674.40

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Solution

The fourth proportional to 3,935.55, 5,428.20 and 2,674.40 is: 3,688.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.55 : 5,428.20 = 2,674.40 : x
  2. Step 2: Convert to fraction form
    3,935.55/5,428.20 = 2,674.40/x
  3. Step 3: Cross multiply
    3,935.55x = 5,428.20 × 2,674.40
  4. Step 4: Simplify right side
    3,935.55x = 14,517,178.08
  5. Step 5: Solve for x
    x = 14,517,178.08/3,935.55
  6. Step 6: Final answer
    x = 3,688.73

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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.