Home / 3,928.63-5,421.53-2,136.13

Finding the Fourth Proportional to 3,928.63, 5,421.53 and 2,136.13

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Solution

The fourth proportional to 3,928.63, 5,421.53 and 2,136.13 is: 2,947.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.63 : 5,421.53 = 2,136.13 : x
  2. Step 2: Convert to fraction form
    3,928.63/5,421.53 = 2,136.13/x
  3. Step 3: Cross multiply
    3,928.63x = 5,421.53 × 2,136.13
  4. Step 4: Simplify right side
    3,928.63x = 11,581,092.88
  5. Step 5: Solve for x
    x = 11,581,092.88/3,928.63
  6. Step 6: Final answer
    x = 2,947.87

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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.