Home / 20,854.47-31,286.57-6,815.15

Finding the Fourth Proportional to 20,854.47, 31,286.57 and 6,815.15

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Solution

The fourth proportional to 20,854.47, 31,286.57 and 6,815.15 is: 10,224.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.47 : 31,286.57 = 6,815.15 : x
  2. Step 2: Convert to fraction form
    20,854.47/31,286.57 = 6,815.15/x
  3. Step 3: Cross multiply
    20,854.47x = 31,286.57 × 6,815.15
  4. Step 4: Simplify right side
    20,854.47x = 213,222,667.54
  5. Step 5: Solve for x
    x = 213,222,667.54/20,854.47
  6. Step 6: Final answer
    x = 10,224.31

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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.