Home / 3,922.40-5,412.98-2,154.17

Finding the Fourth Proportional to 3,922.40, 5,412.98 and 2,154.17

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Solution

The fourth proportional to 3,922.40, 5,412.98 and 2,154.17 is: 2,972.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.40 : 5,412.98 = 2,154.17 : x
  2. Step 2: Convert to fraction form
    3,922.40/5,412.98 = 2,154.17/x
  3. Step 3: Cross multiply
    3,922.40x = 5,412.98 × 2,154.17
  4. Step 4: Simplify right side
    3,922.40x = 11,660,441.29
  5. Step 5: Solve for x
    x = 11,660,441.29/3,922.40
  6. Step 6: Final answer
    x = 2,972.79

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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.