Home / 10,228.80-15,351.30-3,991.80

Finding the Fourth Proportional to 10,228.80, 15,351.30 and 3,991.80

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Solution

The fourth proportional to 10,228.80, 15,351.30 and 3,991.80 is: 5,990.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,228.80 : 15,351.30 = 3,991.80 : x
  2. Step 2: Convert to fraction form
    10,228.80/15,351.30 = 3,991.80/x
  3. Step 3: Cross multiply
    10,228.80x = 15,351.30 × 3,991.80
  4. Step 4: Simplify right side
    10,228.80x = 61,279,319.34
  5. Step 5: Solve for x
    x = 61,279,319.34/10,228.80
  6. Step 6: Final answer
    x = 5,990.86

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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.