Home / 20,815.03-31,214.71-6,771.39

Finding the Fourth Proportional to 20,815.03, 31,214.71 and 6,771.39

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Solution

The fourth proportional to 20,815.03, 31,214.71 and 6,771.39 is: 10,154.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.03 : 31,214.71 = 6,771.39 : x
  2. Step 2: Convert to fraction form
    20,815.03/31,214.71 = 6,771.39/x
  3. Step 3: Cross multiply
    20,815.03x = 31,214.71 × 6,771.39
  4. Step 4: Simplify right side
    20,815.03x = 211,366,975.15
  5. Step 5: Solve for x
    x = 211,366,975.15/20,815.03
  6. Step 6: Final answer
    x = 10,154.54

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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.