Home / 3,720.88-5,138.64-3,221.12

Finding the Fourth Proportional to 3,720.88, 5,138.64 and 3,221.12

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Solution

The fourth proportional to 3,720.88, 5,138.64 and 3,221.12 is: 4,448.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.88 : 5,138.64 = 3,221.12 : x
  2. Step 2: Convert to fraction form
    3,720.88/5,138.64 = 3,221.12/x
  3. Step 3: Cross multiply
    3,720.88x = 5,138.64 × 3,221.12
  4. Step 4: Simplify right side
    3,720.88x = 16,552,176.08
  5. Step 5: Solve for x
    x = 16,552,176.08/3,720.88
  6. Step 6: Final answer
    x = 4,448.46

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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.