Home / 3,922.39-5,412.87-2,153.95

Finding the Fourth Proportional to 3,922.39, 5,412.87 and 2,153.95

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Solution

The fourth proportional to 3,922.39, 5,412.87 and 2,153.95 is: 2,972.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.39 : 5,412.87 = 2,153.95 : x
  2. Step 2: Convert to fraction form
    3,922.39/5,412.87 = 2,153.95/x
  3. Step 3: Cross multiply
    3,922.39x = 5,412.87 × 2,153.95
  4. Step 4: Simplify right side
    3,922.39x = 11,659,051.34
  5. Step 5: Solve for x
    x = 11,659,051.34/3,922.39
  6. Step 6: Final answer
    x = 2,972.44

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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.