Home / 3,935.38-5,430.82-2,142.85

Finding the Fourth Proportional to 3,935.38, 5,430.82 and 2,142.85

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Solution

The fourth proportional to 3,935.38, 5,430.82 and 2,142.85 is: 2,957.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.38 : 5,430.82 = 2,142.85 : x
  2. Step 2: Convert to fraction form
    3,935.38/5,430.82 = 2,142.85/x
  3. Step 3: Cross multiply
    3,935.38x = 5,430.82 × 2,142.85
  4. Step 4: Simplify right side
    3,935.38x = 11,637,432.64
  5. Step 5: Solve for x
    x = 11,637,432.64/3,935.38
  6. Step 6: Final answer
    x = 2,957.13

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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.