Home / 3,720.86-5,121.90-3,216.48

Finding the Fourth Proportional to 3,720.86, 5,121.90 and 3,216.48

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Solution

The fourth proportional to 3,720.86, 5,121.90 and 3,216.48 is: 4,427.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.86 : 5,121.90 = 3,216.48 : x
  2. Step 2: Convert to fraction form
    3,720.86/5,121.90 = 3,216.48/x
  3. Step 3: Cross multiply
    3,720.86x = 5,121.90 × 3,216.48
  4. Step 4: Simplify right side
    3,720.86x = 16,474,488.91
  5. Step 5: Solve for x
    x = 16,474,488.91/3,720.86
  6. Step 6: Final answer
    x = 4,427.60

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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.