Home / 3,936.70-5,430.85-2,930.68

Finding the Fourth Proportional to 3,936.70, 5,430.85 and 2,930.68

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Solution

The fourth proportional to 3,936.70, 5,430.85 and 2,930.68 is: 4,043.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.70 : 5,430.85 = 2,930.68 : x
  2. Step 2: Convert to fraction form
    3,936.70/5,430.85 = 2,930.68/x
  3. Step 3: Cross multiply
    3,936.70x = 5,430.85 × 2,930.68
  4. Step 4: Simplify right side
    3,936.70x = 15,916,082.94
  5. Step 5: Solve for x
    x = 15,916,082.94/3,936.70
  6. Step 6: Final answer
    x = 4,043.00

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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.