Home / 3,922.40-5,412.48-3,136.16

Finding the Fourth Proportional to 3,922.40, 5,412.48 and 3,136.16

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Solution

The fourth proportional to 3,922.40, 5,412.48 and 3,136.16 is: 4,327.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.40 : 5,412.48 = 3,136.16 : x
  2. Step 2: Convert to fraction form
    3,922.40/5,412.48 = 3,136.16/x
  3. Step 3: Cross multiply
    3,922.40x = 5,412.48 × 3,136.16
  4. Step 4: Simplify right side
    3,922.40x = 16,974,403.28
  5. Step 5: Solve for x
    x = 16,974,403.28/3,922.40
  6. Step 6: Final answer
    x = 4,327.56

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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.