Home / 20,815.74-31,233.86-9,720.82

Finding the Fourth Proportional to 20,815.74, 31,233.86 and 9,720.82

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Solution

The fourth proportional to 20,815.74, 31,233.86 and 9,720.82 is: 14,586.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.74 : 31,233.86 = 9,720.82 : x
  2. Step 2: Convert to fraction form
    20,815.74/31,233.86 = 9,720.82/x
  3. Step 3: Cross multiply
    20,815.74x = 31,233.86 × 9,720.82
  4. Step 4: Simplify right side
    20,815.74x = 303,618,716.22
  5. Step 5: Solve for x
    x = 303,618,716.22/20,815.74
  6. Step 6: Final answer
    x = 14,586.02

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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.