Home / 20,669.72-30,986.34-7,519.80

Finding the Fourth Proportional to 20,669.72, 30,986.34 and 7,519.80

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Solution

The fourth proportional to 20,669.72, 30,986.34 and 7,519.80 is: 11,273.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.72 : 30,986.34 = 7,519.80 : x
  2. Step 2: Convert to fraction form
    20,669.72/30,986.34 = 7,519.80/x
  3. Step 3: Cross multiply
    20,669.72x = 30,986.34 × 7,519.80
  4. Step 4: Simplify right side
    20,669.72x = 233,011,079.53
  5. Step 5: Solve for x
    x = 233,011,079.53/20,669.72
  6. Step 6: Final answer
    x = 11,273.06

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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.