Home / 3,928.51-5,421.38-2,136

Finding the Fourth Proportional to 3,928.51, 5,421.38 and 2,136

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Solution

The fourth proportional to 3,928.51, 5,421.38 and 2,136 is: 2,947.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.51 : 5,421.38 = 2,136 : x
  2. Step 2: Convert to fraction form
    3,928.51/5,421.38 = 2,136/x
  3. Step 3: Cross multiply
    3,928.51x = 5,421.38 × 2,136
  4. Step 4: Simplify right side
    3,928.51x = 11,580,057
  5. Step 5: Solve for x
    x = 11,580,057/3,928.51
  6. Step 6: Final answer
    x = 2,947.70

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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.