Home / 7,138.87-9,847.56-4,154.36

Finding the Fourth Proportional to 7,138.87, 9,847.56 and 4,154.36

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Solution

The fourth proportional to 7,138.87, 9,847.56 and 4,154.36 is: 5,730.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.87 : 9,847.56 = 4,154.36 : x
  2. Step 2: Convert to fraction form
    7,138.87/9,847.56 = 4,154.36/x
  3. Step 3: Cross multiply
    7,138.87x = 9,847.56 × 4,154.36
  4. Step 4: Simplify right side
    7,138.87x = 40,910,309.36
  5. Step 5: Solve for x
    x = 40,910,309.36/7,138.87
  6. Step 6: Final answer
    x = 5,730.64

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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.