Home / 3,935.85-5,430.67-2,991.39

Finding the Fourth Proportional to 3,935.85, 5,430.67 and 2,991.39

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Solution

The fourth proportional to 3,935.85, 5,430.67 and 2,991.39 is: 4,127.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.85 : 5,430.67 = 2,991.39 : x
  2. Step 2: Convert to fraction form
    3,935.85/5,430.67 = 2,991.39/x
  3. Step 3: Cross multiply
    3,935.85x = 5,430.67 × 2,991.39
  4. Step 4: Simplify right side
    3,935.85x = 16,245,251.93
  5. Step 5: Solve for x
    x = 16,245,251.93/3,935.85
  6. Step 6: Final answer
    x = 4,127.51

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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.