Home / 3,638.81-5,021.56-1,982.81

Finding the Fourth Proportional to 3,638.81, 5,021.56 and 1,982.81

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Solution

The fourth proportional to 3,638.81, 5,021.56 and 1,982.81 is: 2,736.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638.81 : 5,021.56 = 1,982.81 : x
  2. Step 2: Convert to fraction form
    3,638.81/5,021.56 = 1,982.81/x
  3. Step 3: Cross multiply
    3,638.81x = 5,021.56 × 1,982.81
  4. Step 4: Simplify right side
    3,638.81x = 9,956,814.42
  5. Step 5: Solve for x
    x = 9,956,814.42/3,638.81
  6. Step 6: Final answer
    x = 2,736.28

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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.