Home / 3,922.35-5,412.66-2,153.99

Finding the Fourth Proportional to 3,922.35, 5,412.66 and 2,153.99

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Solution

The fourth proportional to 3,922.35, 5,412.66 and 2,153.99 is: 2,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.35 : 5,412.66 = 2,153.99 : x
  2. Step 2: Convert to fraction form
    3,922.35/5,412.66 = 2,153.99/x
  3. Step 3: Cross multiply
    3,922.35x = 5,412.66 × 2,153.99
  4. Step 4: Simplify right side
    3,922.35x = 11,658,788.45
  5. Step 5: Solve for x
    x = 11,658,788.45/3,922.35
  6. Step 6: Final answer
    x = 2,972.40

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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.