Home / 3,928.53-5,415.08-2,981.24

Finding the Fourth Proportional to 3,928.53, 5,415.08 and 2,981.24

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Solution

The fourth proportional to 3,928.53, 5,415.08 and 2,981.24 is: 4,109.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.53 : 5,415.08 = 2,981.24 : x
  2. Step 2: Convert to fraction form
    3,928.53/5,415.08 = 2,981.24/x
  3. Step 3: Cross multiply
    3,928.53x = 5,415.08 × 2,981.24
  4. Step 4: Simplify right side
    3,928.53x = 16,143,611.12
  5. Step 5: Solve for x
    x = 16,143,611.12/3,928.53
  6. Step 6: Final answer
    x = 4,109.33

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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.