Home / 3,421.28-5,123.82-2,685.80

Finding the Fourth Proportional to 3,421.28, 5,123.82 and 2,685.80

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Solution

The fourth proportional to 3,421.28, 5,123.82 and 2,685.80 is: 4,022.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.28 : 5,123.82 = 2,685.80 : x
  2. Step 2: Convert to fraction form
    3,421.28/5,123.82 = 2,685.80/x
  3. Step 3: Cross multiply
    3,421.28x = 5,123.82 × 2,685.80
  4. Step 4: Simplify right side
    3,421.28x = 13,761,555.76
  5. Step 5: Solve for x
    x = 13,761,555.76/3,421.28
  6. Step 6: Final answer
    x = 4,022.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.