Home / 3,928.40-5,426.72-3,721.04

Finding the Fourth Proportional to 3,928.40, 5,426.72 and 3,721.04

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Solution

The fourth proportional to 3,928.40, 5,426.72 and 3,721.04 is: 5,140.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.40 : 5,426.72 = 3,721.04 : x
  2. Step 2: Convert to fraction form
    3,928.40/5,426.72 = 3,721.04/x
  3. Step 3: Cross multiply
    3,928.40x = 5,426.72 × 3,721.04
  4. Step 4: Simplify right side
    3,928.40x = 20,193,042.19
  5. Step 5: Solve for x
    x = 20,193,042.19/3,928.40
  6. Step 6: Final answer
    x = 5,140.27

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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.