Home / 20,581.26-30,871.90-4,998.78

Finding the Fourth Proportional to 20,581.26, 30,871.90 and 4,998.78

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Solution

The fourth proportional to 20,581.26, 30,871.90 and 4,998.78 is: 7,498.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.26 : 30,871.90 = 4,998.78 : x
  2. Step 2: Convert to fraction form
    20,581.26/30,871.90 = 4,998.78/x
  3. Step 3: Cross multiply
    20,581.26x = 30,871.90 × 4,998.78
  4. Step 4: Simplify right side
    20,581.26x = 154,321,836.28
  5. Step 5: Solve for x
    x = 154,321,836.28/20,581.26
  6. Step 6: Final answer
    x = 7,498.17

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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.