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Finding the Fourth Proportional to 3,947.04, 5,920.92 and 3,425.40

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Solution

The fourth proportional to 3,947.04, 5,920.92 and 3,425.40 is: 5,138.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.04 : 5,920.92 = 3,425.40 : x
  2. Step 2: Convert to fraction form
    3,947.04/5,920.92 = 3,425.40/x
  3. Step 3: Cross multiply
    3,947.04x = 5,920.92 × 3,425.40
  4. Step 4: Simplify right side
    3,947.04x = 20,281,519.37
  5. Step 5: Solve for x
    x = 20,281,519.37/3,947.04
  6. Step 6: Final answer
    x = 5,138.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.