Home / 3,922.07-5,412.56-2,153.75

Finding the Fourth Proportional to 3,922.07, 5,412.56 and 2,153.75

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Solution

The fourth proportional to 3,922.07, 5,412.56 and 2,153.75 is: 2,972.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.07 : 5,412.56 = 2,153.75 : x
  2. Step 2: Convert to fraction form
    3,922.07/5,412.56 = 2,153.75/x
  3. Step 3: Cross multiply
    3,922.07x = 5,412.56 × 2,153.75
  4. Step 4: Simplify right side
    3,922.07x = 11,657,263.27
  5. Step 5: Solve for x
    x = 11,657,263.27/3,922.07
  6. Step 6: Final answer
    x = 2,972.23

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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.