Home / 5,428.26-8,142.40-1,324.26

Finding the Fourth Proportional to 5,428.26, 8,142.40 and 1,324.26

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Solution

The fourth proportional to 5,428.26, 8,142.40 and 1,324.26 is: 1,986.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.26 : 8,142.40 = 1,324.26 : x
  2. Step 2: Convert to fraction form
    5,428.26/8,142.40 = 1,324.26/x
  3. Step 3: Cross multiply
    5,428.26x = 8,142.40 × 1,324.26
  4. Step 4: Simplify right side
    5,428.26x = 10,782,654.62
  5. Step 5: Solve for x
    x = 10,782,654.62/5,428.26
  6. Step 6: Final answer
    x = 1,986.39

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Double scale
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Similar ratio
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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.