Home / 5,415.62-8,122.41-2,639.51

Finding the Fourth Proportional to 5,415.62, 8,122.41 and 2,639.51

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Solution

The fourth proportional to 5,415.62, 8,122.41 and 2,639.51 is: 3,958.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.62 : 8,122.41 = 2,639.51 : x
  2. Step 2: Convert to fraction form
    5,415.62/8,122.41 = 2,639.51/x
  3. Step 3: Cross multiply
    5,415.62x = 8,122.41 × 2,639.51
  4. Step 4: Simplify right side
    5,415.62x = 21,439,141.81
  5. Step 5: Solve for x
    x = 21,439,141.81/5,415.62
  6. Step 6: Final answer
    x = 3,958.76

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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.