Home / 3,924.18-5,415.34-2,131.64

Finding the Fourth Proportional to 3,924.18, 5,415.34 and 2,131.64

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Solution

The fourth proportional to 3,924.18, 5,415.34 and 2,131.64 is: 2,941.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924.18 : 5,415.34 = 2,131.64 : x
  2. Step 2: Convert to fraction form
    3,924.18/5,415.34 = 2,131.64/x
  3. Step 3: Cross multiply
    3,924.18x = 5,415.34 × 2,131.64
  4. Step 4: Simplify right side
    3,924.18x = 11,543,543.26
  5. Step 5: Solve for x
    x = 11,543,543.26/3,924.18
  6. Step 6: Final answer
    x = 2,941.65

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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.