Home / 3,937.70-5,438.79-2,947.28

Finding the Fourth Proportional to 3,937.70, 5,438.79 and 2,947.28

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Solution

The fourth proportional to 3,937.70, 5,438.79 and 2,947.28 is: 4,070.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,937.70 : 5,438.79 = 2,947.28 : x
  2. Step 2: Convert to fraction form
    3,937.70/5,438.79 = 2,947.28/x
  3. Step 3: Cross multiply
    3,937.70x = 5,438.79 × 2,947.28
  4. Step 4: Simplify right side
    3,937.70x = 16,029,609.80
  5. Step 5: Solve for x
    x = 16,029,609.80/3,937.70
  6. Step 6: Final answer
    x = 4,070.81

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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.