Home / 20,388.14-30,585.25-7,239.41

Finding the Fourth Proportional to 20,388.14, 30,585.25 and 7,239.41

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Solution

The fourth proportional to 20,388.14, 30,585.25 and 7,239.41 is: 10,860.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.14 : 30,585.25 = 7,239.41 : x
  2. Step 2: Convert to fraction form
    20,388.14/30,585.25 = 7,239.41/x
  3. Step 3: Cross multiply
    20,388.14x = 30,585.25 × 7,239.41
  4. Step 4: Simplify right side
    20,388.14x = 221,419,164.70
  5. Step 5: Solve for x
    x = 221,419,164.70/20,388.14
  6. Step 6: Final answer
    x = 10,860.19

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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.