Home / 20,815.48-31,239.62-10,960.60

Finding the Fourth Proportional to 20,815.48, 31,239.62 and 10,960.60

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Solution

The fourth proportional to 20,815.48, 31,239.62 and 10,960.60 is: 16,449.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.48 : 31,239.62 = 10,960.60 : x
  2. Step 2: Convert to fraction form
    20,815.48/31,239.62 = 10,960.60/x
  3. Step 3: Cross multiply
    20,815.48x = 31,239.62 × 10,960.60
  4. Step 4: Simplify right side
    20,815.48x = 342,404,978.97
  5. Step 5: Solve for x
    x = 342,404,978.97/20,815.48
  6. Step 6: Final answer
    x = 16,449.54

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1.5x scale

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.