Home / 20,619.56-30,929.28-7,471.88

Finding the Fourth Proportional to 20,619.56, 30,929.28 and 7,471.88

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Solution

The fourth proportional to 20,619.56, 30,929.28 and 7,471.88 is: 11,207.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.56 : 30,929.28 = 7,471.88 : x
  2. Step 2: Convert to fraction form
    20,619.56/30,929.28 = 7,471.88/x
  3. Step 3: Cross multiply
    20,619.56x = 30,929.28 × 7,471.88
  4. Step 4: Simplify right side
    20,619.56x = 231,099,868.65
  5. Step 5: Solve for x
    x = 231,099,868.65/20,619.56
  6. Step 6: Final answer
    x = 11,207.80

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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.